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Area Code 301 Map, Cities and Telecommunication Exchanges

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Area code 301 is located in Maryland. The following table lists the area code exchanges and switches:

301 Area Code Exchanges & Switches:

Prefix Main City Company Zip Code Switch Name Prefix Type Introduced
(301) 200- Bandwidth.Com Clec CLEC 02/24/2011
(301) 200- Bandwidth.Com Clec CLEC 03/01/2011
(301) 200- Mcimetro Access Transmission Services WASHINGTON CLEC 07/29/2011
(301) 200- Bandwidth.Com Clec CLEC 05/04/2012
(301) 200- Bandwidth.Com Clec CLEC 08/08/2012
(301) 201- UNKNOWN -
(301) 202- New Cingular Wireless Pcs WIRELESS 12/23/2008
(301) 202- Bandwidth.Com Clec CLEC 04/08/2011
(301) 202- Bandwidth.Com Clec CLEC 04/08/2011
(301) 202- Ymax Communications Corp CLEC 05/27/2010
(301) 202- Ymax Communications Corp CLEC 01/05/2010
(301) 203- Fort Washington Verizon Maryland 20744-2756 WASZ 6 RBOC -
(301) 204- New Cingular Wireless Pcs WIRELESS 03/14/2005
(301) 204- New Cingular Wireless Pcs WIRELESS 03/14/2005
(301) 204- New Cingular Wireless Pcs WIRELESS 03/14/2005
(301) 205- MAYO Cavalier Telephone Mid Atlantic 21106 CLEC 12/30/2010
(301) 207- Usa Mobility Wireless WIRELESS -
(301) 209- Hyattsville Verizon Maryland 20781-1618 HYATTSVILLE RBOC -
(301) 211- UNKNOWN -
(301) 213- Beltsville Sprint Spectrum 20705-1238 PCS -
(301) 215- Chevy Chase Verizon Maryland 20815-5205 WASZ 2 RBOC -
(301) 217- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC -
(301) 219- New Cingular Wireless Pcs WIRELESS -
(301) 221- New Cingular Wireless Pcs WIRELESS -
(301) 222- HERNDON Omnipoint Communications Cap Operations 22070 PCS 11/11/2005
(301) 223- Williamsport Verizon Maryland 21795-1201 WILLIAMSPORT RBOC -
(301) 224- Usa Mobility Wireless WIRELESS -
(301) 225- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 05/26/2009
(301) 225- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 05/26/2009
(301) 225- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 05/26/2009
(301) 225- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 05/26/2009
(301) 225- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 05/26/2009
(301) 226- Landover Verizon Maryland 20785-2136 WASZ 4 RBOC -
(301) 228- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC -
(301) 230- Rockville Verizon Maryland 20852-4801 WASZ 11 RBOC -
(301) 232- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(301) 232- Baltimore Us Lec Of Maryland 21202-4035 MCLEAN CLEC 02/14/2003
(301) 233- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 234- ALLENTOWN At&T Local 20222 WASHINGTON CLEC 01/15/2003
(301) 235- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 236- Silver Spring Verizon Maryland 20904-6213 WASZ 12 RBOC -
(301) 238- TEMPLE HILLS Verizon Maryland 20031 WASZ 5 RBOC -
(301) 238- TEMPLE HILLS Verizon Maryland 20031 WASZ 5 RBOC 06/10/2004
(301) 238- TEMPLE HILLS Paetec Communications 20031 MONTGOMERY CLEC 01/26/2007
(301) 240- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 241- Cascade Bandwidth.Com Clec 21719-1903 CLEC 12/27/2011
(301) 241- Cascade Sprint Communications Company 21719-1903 CLEC 05/22/2007
(301) 242- Washington Core Communications 20011-3414 CLEC 02/25/2004
(301) 243- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 07/20/2006
(301) 243- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 07/25/2006
(301) 243- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 07/25/2006
(301) 243- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 07/25/2006
(301) 243- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 07/25/2006
(301) 243- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 07/25/2006
(301) 244- Chevy Chase Xo Maryland 20815-5205 CLEC 10/09/2008
(301) 244- Chevy Chase Broadview Networks 20815-5205 UNKNOWN 04/18/2011
(301) 244- Chevy Chase Comcast Phone Of Northern Maryland 20815-5205 CLEC 07/07/2005
(301) 244- Chevy Chase Paetec Communications 20815-5205 MONTGOMERY CLEC 01/27/2006
(301) 244- Chevy Chase Bandwidth.Com Clec 20815-5205 CLEC 11/17/2008
(301) 245- BITTINGER Core Communications 21522 CLEC 02/27/2004
(301) 246- NANJEMOY Verizon Maryland 20662 NANJEMOY RBOC -
(301) 246- NANJEMOY Core Communications 20662 CLEC 02/26/2004
(301) 246- NANJEMOY Bandwidth.Com Clec 20662 CLEC 05/04/2011
(301) 248- ALLENTOWN Verizon Maryland 20222 WASZ 6 RBOC -
(301) 250- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(301) 250- Baltimore Infotelecom 21202-4035 UNKNOWN 02/06/2012
(301) 250- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 08/17/2011
(301) 250- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 08/17/2011
(301) 252- Silver Spring Nextel Communications 20904-7822 WIRELESS -
(301) 254- Beltsville Sprint Spectrum 20705-1238 PCS -
(301) 256- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(301) 256- Baltimore Leap Wireless Intl, Dba Cricket Comm 21202-4035 PCS 06/14/2010
(301) 256- Baltimore Omnipoint Communications Cap Operations 21202-4035 PCS 12/10/2004
(301) 256- Baltimore Leap Wireless Intl, Dba Cricket Comm 21202-4035 PCS 02/11/2010
(301) 256- Baltimore Omnipoint Communications Cap Operations 21202-4035 PCS 06/20/2005
(301) 258- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 259- TOMPKINSVILLE Bandwidth.Com Clec 20664 CLEC 11/17/2008
(301) 259- TOMPKINSVILLE Rnk 20664 CLEC 09/24/2007
(301) 260- Olney Tw Telecom Of Maryland 20832-2424 LAUREL CLEC 05/02/2006
(301) 261- Annapolis Verizon Maryland 21401-1910 ANNAPOLIS RBOC -
(301) 263- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC -
(301) 263- BETHESDA Nextel Communications 20014 WIRELESS 05/12/2006
(301) 263- BETHESDA Xo Maryland 20014 CLEC 07/20/2005
(301) 264- MOUNT SAVAGE Verizon Maryland 21545 MOUNT SAVAGE RBOC -
(301) 264- MOUNT SAVAGE Idt America Corp 21545 CLEC 02/10/2006
(301) 265- ALLENTOWN Verizon Maryland 20222 WASZ 6 RBOC -
(301) 266- New Cingular Wireless Pcs WIRELESS -
(301) 267- Beltsville Sprint Spectrum 20705-1238 PCS 10/05/2011
(301) 267- Beltsville Sprint Spectrum 20705-1238 PCS 10/05/2011
(301) 267- Beltsville Sprint Spectrum 20705-1238 PCS 10/05/2011
(301) 267- Beltsville Sprint Spectrum 20705-1238 PCS 10/05/2011
(301) 267- Beltsville Sprint Spectrum 20705-1238 PCS 10/05/2011
(301) 268- Cumberland Uscoc Of Cumberland, Dba United States Cel 21502-3018 WIRELESS -
(301) 270- Hyattsville Verizon Maryland 20783-3056 WASZ 4 RBOC -
(301) 271- THURMONT Core Communications 21788 CLEC 02/27/2004
(301) 272- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 02/08/2008
(301) 272- Baltimore Omnipoint Communications Cap Operations 21202-4035 PCS 09/11/2006
(301) 273- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(301) 273- Baltimore Comcast Phone Of Northern Maryland 21202-4035 CLEC 05/08/2006
(301) 273- Baltimore Omnipoint Communications Cap Operations 21202-4035 PCS 07/29/2003
(301) 273- Baltimore Omnipoint Communications Cap Operations 21202-4035 PCS 12/01/2006
(301) 274- HUGHESVILLE Cavalier East 20637 CLEC 12/30/2010
(301) 275- New Cingular Wireless Pcs WIRELESS -
(301) 276- Rockville Bandwidth.Com Clec 20852-4801 CLEC 08/09/2012
(301) 276- Rockville Paetec Communications 20852-4801 MONTGOMERY CLEC 01/25/2007
(301) 276- Rockville Bandwidth.Com Clec 20852-4801 CLEC 03/23/2012
(301) 276- Rockville Paetec Communications 20852-4801 MONTGOMERY CLEC 10/25/2007
(301) 278- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(301) 278- Baltimore Rnk 21202-4035 CLEC 06/04/2012
(301) 278- Baltimore At&T Local 21202-4035 WASHINGTON CLEC 10/15/2003
(301) 278- Baltimore Comcast Phone Of Northern Maryland 21202-4035 CLEC 07/03/2008
(301) 279- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC -
(301) 281- Rockville Mcimetro Access Transmission Services 20852-4801 ROCKVILLE CLEC -
(301) 281- Rockville Omnipoint Communications Cap Operations 20852-4801 ROCKVILLE PCS 03/14/2008
(301) 281- Rockville Omnipoint Communications Cap Operations 20852-4801 PCS 08/20/2008
(301) 281- Rockville Atx Telecommunications Services, Ltd 20852-4801 CLEC 02/26/2004
(301) 283- BRYANS ROAD Verizon Maryland 20616 INDIAN HEAD RBOC -
(301) 283- BRYANS ROAD Omnipoint Communications Cap Operations 20616 PCS 09/12/2008
(301) 284- Rockville Bandwidth.Com Clec 20852-4801 CLEC 10/20/2004
(301) 286- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 287- Rockville Atx Telecommunications Services, Ltd 20852-4801 CLEC 02/26/2004
(301) 288- Rockville Core Communications 20852-4801 CLEC 02/26/2004
(301) 288- Rockville Tw Telecom Of Maryland 20852-4801 LAUREL CLEC 05/02/2006
(301) 288- Rockville Rnk 20852-4801 CLEC 03/25/2011
(301) 288- Rockville Comcast Phone Of Northern Maryland 20852-4801 CLEC 09/12/2006
(301) 289- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 290- MECHANICSVILLE Verizon Maryland 20659 RBOC -
(301) 290- MECHANICSVILLE Atx Telecommunications Services, Ltd 20659 CLEC 02/26/2004
(301) 291- Rockville Mcimetro Access Transmission Services 20852-4801 ROCKVILLE CLEC -
(301) 291- Rockville Bandwidth.Com Clec 20852-4801 CLEC 07/16/2012
(301) 292- Fort Washington Verizon Maryland 20744-2756 WASZ 6 RBOC -
(301) 294- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC -
(301) 296- RESTON Mci Worldcom Communications 22091 RESTON CLEC -
(301) 298- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 298- Washington Level 3 Communications 20011-3414 CLEC 03/03/2008
(301) 300- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS 03/30/2007
(301) 300- Annapolis Junction Sprint Spectrum 20701-1104 PCS 06/07/2007
(301) 300- Annapolis Junction Sprint Spectrum 20701-1104 PCS 06/07/2007
(301) 300- Annapolis Junction Sprint Spectrum 20701-1104 PCS 06/07/2007
(301) 300- Annapolis Junction Sprint Spectrum 20701-1104 PCS 06/07/2007
(301) 300- Annapolis Junction Sprint Spectrum 20701-1104 PCS 06/07/2007
(301) 302- Frederick Sprint Spectrum 21701-5672 PCS 10/05/2004
(301) 302- Frederick Nextel Communications 21701-5672 WIRELESS 03/02/2005
(301) 302- Frederick Sprint Spectrum 21701-5672 PCS 03/22/2006
(301) 302- Frederick New Cingular Wireless Pcs 21701-5672 WIRELESS 07/26/2007
(301) 302- Frederick Sprint Communications Company 21701-5672 CLEC 04/18/2006
(301) 302- Frederick Sprint Spectrum 21701-5672 PCS 02/18/2005
(301) 304- Comcast Phone Of Northern Maryland FREDERICK CLEC 03/06/2007
(301) 304- Bandwidth.Com Clec CLEC 09/17/2010
(301) 304- Mci Worldcom Communications BUCKEYSTN CLEC 08/21/2009
(301) 305- Sprint Spectrum PCS -
(301) 307- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(301) 309- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC -
(301) 310- Columbia Cellco Partnership Dba Verizon Wireless 21045-4602 WIRELESS 10/06/2010
(301) 310- Columbia Cellco Partnership Dba Verizon Wireless 21045-4602 WIRELESS 05/04/2011
(301) 310- Columbia Cellco Partnership Dba Verizon Wireless 21045-4602 WIRELESS 06/24/2011
(301) 310- Columbia Cellco Partnership Dba Verizon Wireless 21045-4602 WIRELESS 08/08/2011
(301) 310- Columbia Cellco Partnership Dba Verizon Wireless 21045-4602 WIRELESS 09/02/2011
(301) 312- New Cingular Wireless Pcs WIRELESS -
(301) 312- New Cingular Wireless Pcs WIRELESS 08/29/2006
(301) 312- New Cingular Wireless Pcs WIRELESS 08/29/2006
(301) 312- New Cingular Wireless Pcs WIRELESS 08/29/2006
(301) 312- New Cingular Wireless Pcs WIRELESS 08/29/2006
(301) 313- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 315- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC -
(301) 317- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(301) 319- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC -
(301) 321- Chevy Chase Telcove Operations 20815-5205 CLEC -
(301) 322- Landover Verizon Maryland 20785-2136 WASZ 4 RBOC -
(301) 323- Laurel Leap Wireless Intl, Dba Cricket Comm 20707-6102 PCS 02/11/2010
(301) 323- Laurel Bandwidth.Com Clec 20707-6102 CLEC 01/26/2010
(301) 325- Adelphi Cellco Partnership Dba Verizon Wireless 20783-1633 WIRELESS -
(301) 326- Beltsville Sprint Spectrum 20705-1247 PCS 08/09/2011
(301) 326- Beltsville Comcast Phone Of Northern Maryland 20705-1247 CLEC 09/12/2006
(301) 326- Beltsville Comcast Phone Of Northern Maryland 20705-1247 CLEC 09/12/2006
(301) 326- Beltsville Omnipoint Communications Cap Operations 20705-1247 BELTSVILLE PCS 04/21/2004
(301) 326- Beltsville Omnipoint Communications Cap Operations 20705-1247 BELTSVILLE PCS 08/09/2004
(301) 327- Comcast Phone Of Northern Maryland CLEC 03/09/2006
(301) 327- Nationsline CLEC 07/25/2007
(301) 327- Bandwidth.Com Clec CLEC 09/20/2010
(301) 327- Ymax Communications Corp CLEC 09/02/2008
(301) 327- Ymax Communications Corp CLEC 09/02/2008
(301) 328- Comcast Phone Of Northern Maryland CLEC 06/21/2006
(301) 328- Level 3 Communications CLEC 11/15/2006
(301) 328- Ymax Communications Corp CLEC 09/24/2008
(301) 328- Comcast Phone Of Northern Maryland CLEC 09/27/2007
(301) 328- Comcast Phone Of Northern Maryland CLEC 09/27/2007
(301) 328- Ymax Communications Corp CLEC 09/24/2008
(301) 329- Hanover Infotelecom 21076-3103 UNKNOWN 09/12/2012
(301) 330- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 331- Sprint Spectrum PCS 03/10/2004
(301) 333- CAPITOL HEIGHTS Verizon Maryland 20027 WASZ 5 RBOC -
(301) 335- New Cingular Wireless Pcs WIRELESS -
(301) 337- RESTON Mci Worldcom Communications 22091 RESTON CLEC -
(301) 337- RESTON Cellco Partnership Dba Verizon Wireless 22091 RESTON WIRELESS 05/15/2012
(301) 337- RESTON Teleport Communications Group 22091 WASHINGTON CLEC 05/07/2003
(301) 337- RESTON Cellco Partnership Dba Verizon Wireless 22091 WIRELESS 08/06/2012
(301) 337- RESTON Bandwidth.Com Clec 22091 CLEC 01/20/2010
(301) 338- Idt America Corp CLEC 01/31/2006
(301) 338- New Cingular Wireless Pcs WIRELESS 11/26/2007
(301) 338- New Cingular Wireless Pcs WIRELESS 02/28/2011
(301) 338- Sprint Spectrum PCS 08/15/2011
(301) 338- Bandwidth.Com Clec CLEC 01/20/2012
(301) 339- HERNDON Omnipoint Communications Cap Operations 22070 BELTSVILLE PCS 11/17/2006
(301) 339- HERNDON Tw Telecom Of 22070 LAUREL CLEC 02/06/2012
(301) 339- HERNDON Comcast Phone Of Northern Maryland 22070 CLEC 11/01/2012
(301) 341- Landover Verizon Maryland 20785-2136 WASZ 4 RBOC -
(301) 343- Silver Spring Nextel Communications 20904-7822 WIRELESS -
(301) 345- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 347- Chevy Chase Verizon Maryland 20815-5205 WASZ 2 RBOC -
(301) 348- RESTON Core Communications 22091 CLEC 08/02/2012
(301) 349- POOLESVILLE Rnk 20837 POOLESVILLE CLEC 07/20/2010
(301) 349- POOLESVILLE Cavalier East 20837 CLEC 12/30/2010
(301) 351- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 353- GERMANTOWN Verizon Maryland 20767 GAITHERSBURG RBOC -
(301) 355- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC 12/08/2005
(301) 355- Gaithersburg Global Crossing Local Services 20877-2412 WASHINGTON DC CLEC 11/02/2009
(301) 355- Gaithersburg Cbeyond Comm 20877-2412 CLEC 05/21/2008
(301) 355- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC 07/31/2007
(301) 355- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC 07/31/2007
(301) 355- Gaithersburg Ymax Communications Corp 20877-2412 CLEC 01/21/2011
(301) 356- Laurel Cellco Partnership Dba Verizon Wireless 20707-6102 WIRELESS 04/06/2005
(301) 356- Laurel Cellco Partnership Dba Verizon Wireless 20707-6102 WIRELESS 04/06/2005
(301) 356- Laurel Cellco Partnership Dba Verizon Wireless 20707-6102 WIRELESS 04/06/2005
(301) 356- Laurel Cellco Partnership Dba Verizon Wireless 20707-6102 WIRELESS 01/05/2005
(301) 356- Laurel Cellco Partnership Dba Verizon Wireless 20707-6102 WIRELESS 07/07/2005
(301) 357- Adelphi Cellco Partnership Dba Verizon Wireless 20783-1633 WIRELESS 10/12/2006
(301) 357- Adelphi Sprint Spectrum 20783-1633 PCS 08/22/2007
(301) 357- Adelphi Sprint Spectrum 20783-1633 PCS 08/22/2007
(301) 357- Adelphi Sprint Spectrum 20783-1633 PCS 08/22/2007
(301) 357- Adelphi Sprint Spectrum 20783-1633 PCS 08/22/2007
(301) 357- Adelphi Sprint Spectrum 20783-1633 PCS 08/22/2007
(301) 358- Level 3 Communications CLEC 12/20/2004
(301) 358- Level 3 Communications CLEC 12/20/2004
(301) 359- PIEDMONT Verizon Maryland 26750 PIEDMONT RBOC -
(301) 359- PIEDMONT Bandwidth.Com Clec 26750 CLEC 01/11/2012
(301) 360- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC -
(301) 362- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(301) 363- Frederick Level 3 Communications 21701-5672 CLEC 11/14/2008
(301) 363- Frederick Comcast Phone Of Northern Maryland 21701-5672 CLEC 10/26/2012
(301) 363- Frederick At&T Local 21701-5672 MONROVIA CLEC 03/16/2009
(301) 363- Frederick Comcast Phone Of Northern Maryland 21701-5672 CLEC 02/26/2007
(301) 364- RESTON Cbeyond Comm 22091 CLEC 06/08/2012
(301) 364- RESTON Bandwidth.Com Clec 22091 CLEC 09/15/2011
(301) 364- RESTON Omnipoint Communications Cap Operations 22091 BELTSVILLE PCS 06/16/2008
(301) 365- Bethesda Verizon Maryland 20817-1948 WASZ 2 RBOC -
(301) 366- Silver Spring New Cingular Wireless Pcs 20904-7822 WIRELESS 06/07/2010
(301) 366- Silver Spring Nextel Communications 20904-7822 WIRELESS 09/17/2003
(301) 366- Silver Spring Nextel Communications 20904-7822 WIRELESS 09/08/2004
(301) 366- Silver Spring Nextel Communications 20904-7822 WIRELESS 12/05/2003
(301) 366- Silver Spring New Cingular Wireless Pcs 20904-7822 WIRELESS 09/15/2010
(301) 368- DAMASCUS Verizon Maryland 20872 DAMASCUS RBOC -
(301) 369- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(301) 371- BRADDOCK HEIGHTS Verizon Maryland 21714 BRADDOCK HEIGHTS RBOC -
(301) 371- BRADDOCK HEIGHTS Sprint Communications Company 21714 CLEC 05/22/2007
(301) 373- HOLLYWOOD Verizon Maryland 20636 LEONARDTOWN RBOC -
(301) 373- HOLLYWOOD Cbeyond Comm 20636 CLEC 05/21/2008
(301) 375- BRYANS ROAD Verizon Maryland 20616 INDIAN HEAD RBOC -
(301) 375- BRYANS ROAD Core Communications 20616 CLEC 02/26/2004
(301) 375- BRYANS ROAD Cavalier East 20616 CLEC 12/23/2009
(301) 375- BRYANS ROAD Ymax Communications Corp 20616 CLEC 09/15/2009
(301) 377- Alexandria Comcast Phone Of Northern Maryland 22304-6409 CLEC -
(301) 377- Alexandria Cellco Partnership Dba Verizon Wireless 22304-6409 WIRELESS 06/03/2010
(301) 377- Alexandria Omnipoint Communications Cap Operations 22304-6409 PCS 01/21/2005
(301) 377- Alexandria Leap Wireless Intl, Dba Cricket Comm 22304-6409 PCS 01/11/2010
(301) 377- Alexandria Omnipoint Communications Cap Operations 22304-6409 PCS 08/20/2008
(301) 378- Comcast Phone Of Northern Maryland CLEC 02/20/2007
(301) 378- Us Lec Of Maryland FREDERICK CLEC 02/22/2011
(301) 378- Sprint Spectrum PCS 06/27/2011
(301) 378- Sprint Spectrum PCS 06/27/2011
(301) 378- Teleport Communications Group America CLEC 08/01/2012
(301) 379- Beltsville Sprint Spectrum 20705-1238 PCS -
(301) 381- UNKNOWN -
(301) 383- Alexandria Comcast Phone Of Northern Maryland 22304-6409 CLEC -
(301) 384- Silver Spring Verizon Maryland 20904-6213 WASZ 12 RBOC -
(301) 386- Landover Verizon Maryland 20785-2136 WASZ 4 RBOC -
(301) 388- Silver Spring Verizon Maryland 20904-6213 WASZ 12 RBOC -
(301) 388- Silver Spring Bandwidth.Com Clec 20904-6213 WASHDCMTX7X CLEC 04/20/2011
(301) 389- Laurel Ctc Communications Corp 20707-6102 WASHDCMTX7X CLEC 05/24/2006
(301) 391- DAMASCUS Verizon Maryland 20872 DAMASCUS RBOC -
(301) 392- LA PLATA Paetec Communications 20646 MONTGOMERY CLEC 11/03/2006
(301) 392- LA PLATA Bandwidth.Com Clec 20646 CLEC 05/04/2011
(301) 393- Hagerstown Verizon Maryland 21740-5403 HAGERSTOWN RBOC -
(301) 395- Baltimore Cellco Partnership Dba Verizon Wireless 21202-2103 WIRELESS -
(301) 395- Baltimore Cellco Partnership Dba Verizon Wireless 21202-2103 WIRELESS 08/05/2004
(301) 395- Baltimore Cellco Partnership Dba Verizon Wireless 21202-2103 WIRELESS 08/05/2004
(301) 395- Baltimore Cellco Partnership Dba Verizon Wireless 21202-2103 WIRELESS 11/17/2004
(301) 395- Baltimore Cellco Partnership Dba Verizon Wireless 21202-2103 WIRELESS 11/17/2004
(301) 395- Baltimore Cellco Partnership Dba Verizon Wireless 21202-2103 WIRELESS 01/05/2005
(301) 397- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 398- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC 10/13/2003
(301) 398- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC 10/13/2003
(301) 398- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC 10/13/2003
(301) 398- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC 10/13/2003
(301) 398- Rockville Xo Maryland 20850-2600 CLEC 10/13/2003
(301) 399- Silver Spring Nextel Communications 20904-7822 WIRELESS -
(301) 400- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 03/31/2010
(301) 400- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 03/31/2010
(301) 400- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 03/31/2010
(301) 400- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 03/31/2010
(301) 400- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC 03/31/2010
(301) 401- New Cingular Wireless Pcs WIRELESS -
(301) 403- Hyattsville Verizon Maryland 20781-1618 HYATTSVILLE RBOC -
(301) 405- Chevy Chase Paetec Communications 20815-5205 MONTGOMERY CLEC -
(301) 407- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 407- Gaithersburg Nextel Communications 20877-2412 WIRELESS 06/16/2005
(301) 407- Gaithersburg Nextel Communications 20877-2412 WIRELESS 04/07/2006
(301) 407- Gaithersburg Nextel Communications 20877-2412 WIRELESS 11/29/2005
(301) 408- Hyattsville Verizon Maryland 20783-1632 WASZ 3 RBOC -
(301) 408- Hyattsville Omnipoint Communications Cap Operations 20783-1632 WASZ 3 PCS 05/20/2003
(301) 409- Usa Mobility Wireless WIRELESS -
(301) 411- UNKNOWN -
(301) 413- Rockville Verizon Maryland 20852-4801 WASZ 11 RBOC -
(301) 415- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 416- SMITHSBURG Core Communications 21783 CLEC 02/27/2004
(301) 417- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 418- Frederick Nextel Communications 21701-5672 WIRELESS 09/17/2003
(301) 418- Frederick Nextel Communications 21701-5672 WIRELESS 09/17/2003
(301) 418- Frederick Nextel Communications 21701-5672 WIRELESS 01/08/2004
(301) 418- Frederick Fibernet 21701-5672 CLEC 03/26/2004
(301) 418- Frederick Nextel Communications 21701-5672 WIRELESS 08/18/2004
(301) 419- Beltsville Verizon Maryland 20705-1378 MUIRKIRK RBOC -
(301) 421- Silver Spring Verizon Maryland 20904-6213 WASZ 12 RBOC -
(301) 423- TEMPLE HILLS Verizon Maryland 20031 WASZ 5 RBOC -
(301) 425- Beltsville Verizon Maryland 20705-1378 MUIRKIRK RBOC -
(301) 427- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 429- Lanham Verizon Maryland 20706-2515 WASZ 4 RBOC -
(301) 431- Hyattsville Verizon Maryland 20783-1632 WASZ 3 RBOC -
(301) 432- Keedysville Fibernet 21756-1342 CLEC 01/23/2004
(301) 433- ALLENTOWN Omnipoint Communications Cap Operations 20222 BELTSVILLE PCS 12/13/2007
(301) 433- ALLENTOWN Omnipoint Communications Cap Operations 20222 BELTSVILLE PCS 05/19/2008
(301) 433- ALLENTOWN Omnipoint Communications Cap Operations 20222 BELTSVILLE PCS 03/14/2008
(301) 433- ALLENTOWN Verizon Maryland 20222 WASZ 6 RBOC 05/05/2004
(301) 433- ALLENTOWN Verizon Maryland 20222 WASZ 6 RBOC 05/05/2004
(301) 435- Bethesda Verizon Maryland 20892-0001 WASZ 2 RBOC -
(301) 437- Beltsville Sprint Spectrum 20705-1238 PCS -
(301) 439- Hyattsville Verizon Maryland 20783-1632 WASZ 3 RBOC -
(301) 441- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 443- Rockville Verizon Maryland 20852-4801 WASZ 11 RBOC -
(301) 444- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC 12/20/2006
(301) 444- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC 04/20/2004
(301) 444- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC 04/20/2004
(301) 446- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 447- EMMITSBURG Comcast Phone Of Northern Maryland 21727 CLEC 02/23/2007
(301) 448- Alexandria Comcast Phone Of Northern Maryland 22304-6409 CLEC -
(301) 448- Alexandria Cellco Partnership Dba Verizon Wireless 22304-6409 WIRELESS 03/06/2006
(301) 448- Alexandria Baltimore Washington Telephone Bwt 22304-6409 CLEC 12/14/2010
(301) 448- Alexandria Cellco Partnership Dba Verizon Wireless 22304-6409 WIRELESS 09/07/2005
(301) 448- Alexandria Cellco Partnership Dba Verizon Wireless 22304-6409 WIRELESS 10/07/2005
(301) 449- ALLENTOWN Verizon Maryland 20222 WASZ 6 RBOC -
(301) 451- Bethesda Verizon Maryland 20892-0001 WASZ 2 RBOC -
(301) 453- KITZMILLER Verizon Maryland 21538 KITZMILLER RBOC -
(301) 453- KITZMILLER Shentel Communications Company 21538 UNKNOWN 05/29/2012
(301) 454- Hyattsville Verizon Maryland 20781-1618 HYATTSVILLE RBOC -
(301) 455- Beltsville Sprint Spectrum 20705-1238 PCS -
(301) 456- Alexandria Bandwidth.Com Clec 22304-6409 CLEC 05/28/2010
(301) 456- Alexandria Cellco Partnership Dba Verizon Wireless 22304-6409 WIRELESS 05/18/2012
(301) 456- Alexandria Cellco Partnership Dba Verizon Wireless 22304-6409 WIRELESS 11/16/2011
(301) 456- Alexandria Cellco Partnership Dba Verizon Wireless 22304-6409 WIRELESS 08/06/2012
(301) 458- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 458- Washington Cellco Partnership Dba Verizon Wireless 20004-1107 WIRELESS 10/10/2012
(301) 458- Washington Rnk 20004-1107 CLEC 07/21/2010
(301) 458- Washington Rnk 20004-1107 CLEC 07/21/2010
(301) 460- Silver Spring Verizon Maryland 20906-2696 WASZ 11 RBOC -
(301) 462- Hagerstown Sprint Spectrum 21740-6835 PCS -
(301) 462- Hagerstown Sprint Spectrum 21740-6835 PCS 10/11/2011
(301) 462- Hagerstown Sprint Spectrum 21740-6835 PCS 10/11/2011
(301) 462- Hagerstown Sprint Spectrum 21740-6835 PCS 10/11/2011
(301) 462- Hagerstown Sprint Spectrum 21740-6835 PCS 10/11/2011
(301) 463- Lonaconing Verizon Maryland 21539-1015 LONACONING RBOC -
(301) 463- Lonaconing Idt America Corp 21539-1015 CLEC 02/10/2006
(301) 463- Lonaconing Teleport Communications Group America 21539-1015 FREDERICK CLEC 02/23/2012
(301) 465- Hagerstown Sprint Spectrum 21740-6835 PCS -
(301) 465- Hagerstown Sprint Spectrum 21740-6835 PCS 10/11/2011
(301) 465- Hagerstown Sprint Spectrum 21740-6835 PCS 10/11/2011
(301) 465- Hagerstown Sprint Spectrum 21740-6835 PCS 10/11/2011
(301) 465- Hagerstown Sprint Spectrum 21740-6835 PCS 10/11/2011
(301) 467- Adelphi Cellco Partnership Dba Verizon Wireless 20783-1633 WIRELESS -
(301) 469- Bethesda Verizon Maryland 20817-1948 WASZ 2 RBOC -
(301) 471- FREDERICK Cellco Partnership Dba Verizon Wireless 21701 WIRELESS -
(301) 473- BRADDOCK HEIGHTS Verizon Maryland 21714 BRADDOCK HEIGHTS RBOC -
(301) 473- BRADDOCK HEIGHTS Sprint Spectrum 21714 PCS 12/03/2007
(301) 473- BRADDOCK HEIGHTS New Cingular Wireless Pcs 21714 WIRELESS 01/08/2007
(301) 474- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 476- Silver Spring Verizon Maryland 20904-6213 WASZ 12 RBOC -
(301) 476- Silver Spring Level 3 Communications 20904-6213 CLEC 12/22/2004
(301) 476- Silver Spring Level 3 Communications 20904-6213 CLEC 12/22/2004
(301) 477- Alexandria Comcast Phone Of Northern Maryland 22304-6409 CLEC -
(301) 478- FLINTSTONE Core Communications 21530 CLEC 02/26/2004
(301) 478- FLINTSTONE Bandwidth.Com Clec 21530 CLEC 07/27/2012
(301) 480- Bethesda Verizon Maryland 20892-0001 WASZ 2 RBOC -
(301) 482- DAMASCUS Verizon Maryland 20872 DAMASCUS RBOC -
(301) 484- Alexandria Comcast Phone Of Northern Maryland 22304-6409 CLEC -
(301) 485- Alexandria Comcast Phone Of Northern Maryland 22304-6409 CLEC 09/12/2012
(301) 485- Alexandria Paetec Communications 22304-6409 MONTGOMERY CLEC 08/04/2006
(301) 485- Alexandria Bandwidth.Com Clec 22304-6409 CLEC 11/17/2008
(301) 487- MYERSVILLE Verizon Maryland 21773 MYERSVILLE RBOC -
(301) 489- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 491- Frederick Uscoc Of Cumberland, Dba United States Cel 21701-5672 WIRELESS -
(301) 493- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC -
(301) 494- Prince Frederick Bandwidth.Com Clec 20678-4117 CLEC 05/29/2012
(301) 494- Prince Frederick Ymax Communications Corp 20678-4117 CLEC 06/07/2011
(301) 495- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 497- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(301) 499- CAPITOL HEIGHTS Verizon Maryland 20027 WASZ 5 RBOC -
(301) 500- Washington Bandwidth.Com Clec 20005-3903 CLEC 07/05/2011
(301) 500- Washington Xo Maryland 20005-3903 WASHINGTON CLEC 04/06/2011
(301) 500- Washington Sprint Spectrum 20005-3903 PCS 09/21/2010
(301) 500- Washington Sprint Spectrum 20005-3903 PCS 09/21/2010
(301) 500- Washington Cellco Partnership Dba Verizon Wireless 20005-3903 WIRELESS 07/05/2011
(301) 501- New Cingular Wireless Pcs WIRELESS -
(301) 501- New Cingular Wireless Pcs WIRELESS 10/15/2007
(301) 503- New Cingular Wireless Pcs WIRELESS -
(301) 505- TEMPLE HILLS Verizon Maryland 20031 WASZ 5 RBOC -
(301) 507- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 508- Cellco Partnership Dba Verizon Wireless WIRELESS 11/02/2012
(301) 508- Cellco Partnership Dba Verizon Wireless WIRELESS 11/02/2012
(301) 509- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 511- UNKNOWN -
(301) 513- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 515- GERMANTOWN Verizon Maryland 20767 GAITHERSBURG RBOC -
(301) 517- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC -
(301) 519- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 521- OXON HILL Verizon Maryland 20021 WASZ 6 RBOC -
(301) 523- Beltsville Sprint Spectrum 20705-1238 PCS -
(301) 525- Baltimore Quantum Telecommunications 21202-3507 CLEC 10/16/2003
(301) 525- Baltimore Cellco Partnership Dba Verizon Wireless 21202-3507 WIRELESS 05/06/2008
(301) 525- Baltimore Cellco Partnership Dba Verizon Wireless 21202-3507 WIRELESS 09/03/2008
(301) 525- Baltimore Cellco Partnership Dba Verizon Wireless 21202-3507 WIRELESS 02/05/2008
(301) 525- Baltimore Cellco Partnership Dba Verizon Wireless 21202-3507 WIRELESS 10/03/2008
(301) 525- Baltimore Cellco Partnership Dba Verizon Wireless 21202-3507 WIRELESS 12/09/2008
(301) 527- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 529- New Cingular Wireless Pcs WIRELESS -
(301) 531- Lanham Starpower Communications 20706-4347 CLEC -
(301) 531- Lanham Bandwidth.Com Clec 20706-4347 CLEC 01/26/2010
(301) 531- Lanham Atx Telecommunications Services, Ltd 20706-4347 CLEC 03/12/2003
(301) 533- Oakland Verizon Maryland 21550-1610 OAKLAND RBOC -
(301) 533- Oakland Level 3 Communications 21550-1610 CLEC 02/01/2008
(301) 533- Oakland Fibernet 21550-1610 OAKLAND CLEC 01/23/2004
(301) 534- Ymax Communications Corp CLEC 11/21/2006
(301) 534- Ymax Communications Corp CLEC 11/21/2006
(301) 534- Ymax Communications Corp CLEC 11/21/2006
(301) 534- Ymax Communications Corp CLEC 11/21/2006
(301) 534- Ymax Communications Corp CLEC 11/21/2006
(301) 535- New Cingular Wireless Pcs WIRELESS -
(301) 537- Beltsville Sprint Spectrum 20705-1238 PCS -
(301) 539- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 539- Washington Rnk 20004-1107 CLEC 07/20/2010
(301) 539- Washington Lightwave Communications 20004-1107 CLEC 09/08/2005
(301) 539- Washington Verizon Maryland 20004-1107 LA PLATA RBOC 11/29/2007
(301) 539- Washington Bandwidth.Com Clec 20004-1107 CLEC 11/17/2008
(301) 541- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 541- Washington Bandwidth.Com Clec 20004-1107 CLEC 01/20/2010
(301) 541- Washington Bandwidth.Com Clec 20004-1107 CLEC 11/17/2008
(301) 542- Washington Ctc Communications Corp 20004-1107 WASHDCMTX7X CLEC 12/21/2005
(301) 542- Washington Cellco Partnership Dba Verizon Wireless 20004-1107 WIRELESS 05/12/2006
(301) 542- Washington Cellco Partnership Dba Verizon Wireless 20004-1107 WIRELESS 06/15/2011
(301) 542- Washington Cellco Partnership Dba Verizon Wireless 20004-1107 WIRELESS 05/12/2006
(301) 542- Washington Cellco Partnership Dba Verizon Wireless 20004-1107 WIRELESS 07/06/2006
(301) 543- Washington Leap Wireless Intl, Dba Cricket Comm 20004-1107 PCS 06/24/2011
(301) 544- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC -
(301) 546- Usa Mobility Wireless WIRELESS -
(301) 547- Washington New Cingular Wireless Pcs 20005-3903 WIRELESS 02/28/2008
(301) 547- Washington Omnipoint Communications Cap Operations 20005-3903 PCS 12/13/2006
(301) 547- Washington Global Naps 20005-3903 CLEC 02/08/2008
(301) 548- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 549- Laurel Ctc Communications Corp 20707-4315 CLEC 10/20/2011
(301) 551- Laurel Baltimore Washington Telephone Bwt 20707-4320 CLEC -
(301) 553- Usa Mobility Wireless WIRELESS -
(301) 555- Hyattsville Verizon Maryland 20781-1618 HYATTSVILLE RBOC -
(301) 556- Washington Nextel Communications 20004-1107 WIRELESS 10/21/2004
(301) 556- Washington Nextel Communications 20004-1107 WIRELESS 02/05/2004
(301) 556- Washington Nextel Communications 20004-1107 WIRELESS 10/18/2005
(301) 557- WASHINGTON Broadwing Communications 20200 WASHINGTON DC CLEC 09/16/2011
(301) 557- WASHINGTON Broadwing Communications 20200 WASHINGTON DC CLEC 09/16/2011
(301) 557- WASHINGTON Broadwing Communications 20200 WASHINGTON DC CLEC 09/16/2011
(301) 557- WASHINGTON Broadwing Communications 20200 WASHINGTON DC CLEC 09/16/2011
(301) 558- Usa Mobility Wireless WIRELESS -
(301) 560- Landover Paetec Communications 20785-2136 WASZ 4 CLEC -
(301) 562- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 563- Silver Spring Level 3 Communications 20910-3435 CLEC 11/20/2007
(301) 565- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 567- OXON HILL Verizon Maryland 20021 WASZ 6 RBOC -
(301) 569- Baltimore Cellco Partnership Dba Verizon Wireless 21202-4035 WIRELESS -
(301) 569- Baltimore Cellco Partnership Dba Verizon Wireless 21202-4035 WIRELESS 10/04/2012
(301) 569- Baltimore Cellco Partnership Dba Verizon Wireless 21202-4035 WIRELESS 10/04/2012
(301) 569- Baltimore Comcast Phone Of Northern Maryland 21202-4035 CLEC 12/15/2011
(301) 569- Baltimore Rnk 21202-4035 CLEC 03/07/2012
(301) 571- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC -
(301) 573- Frederick Nextel Communications 21702-1513 WIRELESS -
(301) 575- Mc Lean Us Lec Of Maryland 22102-3338 MCLEAN CLEC -
(301) 575- Mc Lean Us Lec Of Maryland 22102-3338 MCLEAN CLEC 06/30/2006
(301) 575- Mc Lean Cellco Partnership Dba Verizon Wireless 22102-3338 WIRELESS 07/06/2006
(301) 576- Chevy Chase Paetec Communications 20815-5205 MONTGOMERY CLEC -
(301) 578- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 579- BADEN Level 3 Communications 20613 CLEC 12/20/2004
(301) 579- BADEN Level 3 Communications 20613 CLEC 12/01/2004
(301) 581- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC -
(301) 582- Williamsport New Cingular Wireless Pcs 21795-1201 WIRELESS 05/02/2008
(301) 584- Laurel Baltimore Washington Telephone Bwt 20707-4320 CLEC -
(301) 586- Beltsville Verizon Maryland 20705-1157 WASZ 13 RBOC -
(301) 586- Beltsville Sprint Spectrum 20705-1157 PCS 11/09/2007
(301) 587- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 589- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 591- Chevy Chase Paetec Communications 20815-5205 MONTGOMERY CLEC -
(301) 592- SILVER SPRING Omnipoint Communications Cap Operations 20901 PCS 07/09/2003
(301) 594- Bethesda Verizon Maryland 20892-0001 WASZ 2 RBOC -
(301) 596- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(301) 598- Silver Spring Verizon Maryland 20906-2696 WASZ 11 RBOC -
(301) 600- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC 07/06/2006
(301) 600- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC 07/07/2006
(301) 600- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC 07/07/2006
(301) 600- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC 07/07/2006
(301) 600- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC 07/07/2006
(301) 600- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC 07/07/2006
(301) 602- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 604- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(301) 605- POOLESVILLE Paetec Communications 20837 CLEC 10/29/2009
(301) 605- POOLESVILLE Omnipoint Communications Cap Operations 20837 BELTSVILLE PCS 05/19/2008
(301) 605- POOLESVILLE Omnipoint Communications Cap Operations 20837 BELTSVILLE PCS 02/23/2007
(301) 605- POOLESVILLE Vdl, Dba Global Telecom Brokers 20837 POOLESVILLE CLEC 02/24/2004
(301) 606- FREDERICK Cellco Partnership Dba Verizon Wireless 21701 WIRELESS -
(301) 608- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 609- LA PLATA Cellco Partnership Dba Verizon Wireless 20646 WIRELESS 01/04/2007
(301) 609- LA PLATA Cellco Partnership Dba Verizon Wireless 20646 WIRELESS 02/06/2007
(301) 611- UNKNOWN -
(301) 612- Teleport Communications Group America CLEC 10/12/2012
(301) 614- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 616- Cumberland Uscoc Of Cumberland, Dba United States Cel 21502-3018 WIRELESS -
(301) 618- Landover Verizon Maryland 20785-2136 WASZ 4 RBOC -
(301) 619- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC -
(301) 621- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(301) 623- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 625- Silver Spring Verizon Maryland 20904-6213 WASZ 12 RBOC -
(301) 627- UPPER MARLBORO Verizon Maryland 20772 WASZ 15 RBOC -
(301) 628- Washington Sprint Spectrum 20004-1107 PCS 11/09/2007
(301) 628- Washington Sprint Spectrum 20004-1107 PCS 11/09/2007
(301) 629- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(301) 631- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC -
(301) 633- New Cingular Wireless Pcs WIRELESS -
(301) 635- Hagerstown New Frontiers Telecommunications 21742-2545 ICO -
(301) 636- Landover Cellco Partnership Dba Verizon Wireless 20785-2136 WIRELESS 10/10/2012
(301) 636- Landover Rnk 20785-2136 CLEC 07/21/2010
(301) 637- Level 3 Communications CLEC -
(301) 637- Ctc Communications Corp WASHDCMTX7X CLEC 11/16/2005
(301) 637- Level 3 Communications CLEC 03/13/2006
(301) 637- Level 3 Communications CLEC 03/08/2005
(301) 637- Level 3 Communications CLEC 05/19/2006
(301) 638- WALDORF Verizon Maryland 20601 WALDORF RBOC -
(301) 640- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 640- Gaithersburg Infotelecom 20877-2412 GAITHERSBURG UNKNOWN 08/08/2012
(301) 640- Gaithersburg Xo Maryland 20877-2412 GAITHERSBURG CLEC 10/25/2012
(301) 642- New Cingular Wireless Pcs WIRELESS -
(301) 644- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC -
(301) 646- New Cingular Wireless Pcs WIRELESS -
(301) 648- New Cingular Wireless Pcs WIRELESS -
(301) 650- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 652- Chevy Chase Verizon Maryland 20815-5205 WASZ 2 RBOC -
(301) 654- Chevy Chase Verizon Maryland 20815-5205 WASZ 2 RBOC -
(301) 656- Chevy Chase Verizon Maryland 20815-5205 WASZ 2 RBOC -
(301) 658- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 658- Washington Level 3 Communications 20004-1107 CLEC 12/22/2004
(301) 658- Washington Level 3 Communications 20004-1107 CLEC 12/22/2004
(301) 658- Washington Level 3 Communications 20004-1107 CLEC 12/22/2004
(301) 659- New Cingular Wireless Pcs WIRELESS -
(301) 660- New Cingular Wireless Pcs WIRELESS 03/19/2004
(301) 660- New Cingular Wireless Pcs WIRELESS 11/02/2009
(301) 660- Bandwidth.Com Clec CLEC 12/07/2010
(301) 660- Bandwidth.Com Clec CLEC 07/05/2011
(301) 660- Bandwidth.Com Clec CLEC 08/08/2011
(301) 662- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC -
(301) 664- Chevy Chase Verizon Maryland 20815-5205 WASZ 2 RBOC -
(301) 666- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 667- New Cingular Wireless Pcs WIRELESS -
(301) 669- SUITLAND Verizon Maryland 20746 WASZ 5 RBOC -
(301) 671- Hagerstown New Frontiers Telecommunications 21742-2545 ICO -
(301) 673- Hagerstown New Frontiers Telecommunications 21742-2545 ICO -
(301) 675- Omnipoint Communications Cap Operations PCS -
(301) 677- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC -
(301) 678- HANCOCK Fibernet 21750 HANCOCK CLEC 01/23/2004
(301) 678- HANCOCK Sprint Communications Company 21750 CLEC 05/22/2007
(301) 678- HANCOCK Bandwidth.Com Clec 21750 CLEC 12/07/2010
(301) 679- Washington Bandwidth.Com Clec 20004-1107 CLEC 04/20/2011
(301) 679- Washington Mci Worldcom Communications 20004-1107 RESTON CLEC 12/17/2008
(301) 679- Washington Bandwidth.Com Clec 20004-1107 CLEC 07/16/2012
(301) 679- Washington Mci Worldcom Communications 20004-1107 CLEC 12/06/2012
(301) 681- SILVER SPRING Verizon Maryland 20901 WASZ 3 RBOC -
(301) 683- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 683- Washington Cellco Partnership Dba Verizon Wireless 20004-1107 WIRELESS 08/06/2012
(301) 683- Washington Bandwidth.Com Clec 20004-1107 CLEC 01/19/2011
(301) 684- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 684- Washington Ymax Communications Corp 20004-1107 CLEC 09/15/2009
(301) 684- Washington Ymax Communications Corp 20004-1107 CLEC 09/15/2009
(301) 684- Washington Level 3 Communications 20004-1107 CLEC 02/18/2011
(301) 684- Washington Ymax Communications Corp 20004-1107 CLEC 09/15/2009
(301) 685- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 685- Washington Level 3 Communications 20004-1107 CLEC 02/28/2003
(301) 685- Washington Level 3 Communications 20004-1107 CLEC 12/20/2004
(301) 685- Washington Quantum Telecommunications 20004-1107 CLEC 10/23/2003
(301) 686- OXON HILL Verizon Maryland 20021 WASZ 6 RBOC 09/20/2005
(301) 686- OXON HILL Omnipoint Communications Cap Operations 20021 PCS 09/12/2008
(301) 686- OXON HILL Bandwidth.Com Clec 20021 CLEC 05/28/2010
(301) 687- FROSTBURG Verizon Maryland 21532 FROSTBURG RBOC -
(301) 688- LAUREL Verizon Maryland 20707 LAUREL RBOC -
(301) 689- FROSTBURG Core Communications 21532 CLEC 02/27/2004
(301) 690- Bandwidth.Com Clec CLEC 06/07/2011
(301) 690- Idt America Corp CLEC 05/24/2007
(301) 690- Cellco Partnership Dba Verizon Wireless WIRELESS 05/18/2012
(301) 690- Rnk CLEC 07/20/2010
(301) 690- Cellco Partnership Dba Verizon Wireless WIRELESS 05/18/2012
(301) 691- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 691- Washington Us Lec Of Maryland 20004-1107 MCLEAN CLEC 01/15/2004
(301) 691- Washington Level 3 Communications 20004-1107 CLEC 11/07/2012
(301) 691- Washington Cellco Partnership Dba Verizon Wireless 20004-1107 WIRELESS 12/03/2012
(301) 693- Frederick Omnipoint Communications Cap Operations 21701-5672 FREDERICK PCS -
(301) 695- Frederick Verizon Maryland 21701-5672 FREDERICK RBOC -
(301) 697- New Cingular Wireless Pcs WIRELESS -
(301) 699- Hyattsville Verizon Maryland 20781-1618 HYATTSVILLE RBOC -
(301) 701- Hyattsville Verizon Maryland 20783-1632 WASZ 3 RBOC -
(301) 703- Frederick Level 3 Communications 21701-5672 CLEC 08/29/2002
(301) 703- Frederick Us Lec Of Maryland 21701-5672 FREDERICK CLEC 11/04/2009
(301) 703- Frederick Comcast Phone Of Northern Maryland 21701-5672 CLEC 04/27/2012
(301) 703- Frederick Level 3 Communications 21701-5672 CLEC 01/18/2005
(301) 705- WALDORF Verizon Maryland 20601 WALDORF RBOC -
(301) 707- Cumberland Uscoc Of Cumberland, Dba United States Cel 21502-3018 WIRELESS -
(301) 708- Hanover Cellco Partnership Dba Verizon Wireless 21076-3103 WIRELESS 06/05/2012
(301) 708- Hanover Cellco Partnership Dba Verizon Wireless 21076-3103 WIRELESS 06/05/2012
(301) 708- Hanover Cellco Partnership Dba Verizon Wireless 21076-3103 WIRELESS 06/05/2012
(301) 708- Hanover Cellco Partnership Dba Verizon Wireless 21076-3103 WIRELESS 11/16/2011
(301) 708- Hanover Cellco Partnership Dba Verizon Wireless 21076-3103 WIRELESS 10/19/2011
(301) 710- Level 3 Communications MCLEAN CLEC 12/30/2005
(301) 710- Level 3 Communications MCLEAN CLEC 11/20/2007
(301) 710- Sprint Spectrum PCS 10/29/2010
(301) 710- Level 3 Communications MCLEAN CLEC 01/05/2006
(301) 710- Sprint Spectrum PCS 10/29/2010
(301) 710- Level 3 Communications MCLEAN CLEC 10/16/2007
(301) 712- Frederick Mcimetro Access Transmission Services 21701-5672 FREDERICK CLEC -
(301) 712- Frederick Nextel Communications 21701-5672 WIRELESS 09/08/2004
(301) 712- Frederick Nextel Communications 21701-5672 WIRELESS 11/11/2005
(301) 712- Frederick Cellco Partnership Dba Verizon Wireless 21701-5672 WIRELESS 04/06/2006
(301) 712- Frederick Cellco Partnership Dba Verizon Wireless 21701-5672 WIRELESS 04/06/2006
(301) 712- Frederick Mcimetro Access Transmission Services 21701-5672 FREDERICK CLEC 07/30/2004
(301) 714- Hagerstown Verizon Maryland 21740-5403 HAGERSTOWN RBOC -
(301) 715- Washington Level 3 Communications 20004-1107 CLEC 09/29/2009
(301) 717- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 719- Washington Teleport Communications Group 20004-1107 WASHINGTON CLEC -
(301) 721- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 723- Cumberland Verizon Maryland 21502-3018 CUMBERLAND RBOC -
(301) 723- Cumberland Mcimetro Access Transmission Services 21502-3018 FREDERICK CLEC 02/14/2006
(301) 725- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(301) 727- Laurel Baltimore Washington Telephone Bwt 20707-4320 CLEC -
(301) 729- CRESAPTOWN Verizon Maryland 21502 CRESAPTOWN RBOC -
(301) 731- Lanham Verizon Maryland 20706-2515 WASZ 4 RBOC -
(301) 732- Cellco Partnership Dba Verizon Wireless WIRELESS 06/05/2012
(301) 732- Cellco Partnership Dba Verizon Wireless WIRELESS 06/05/2012
(301) 732- Cellco Partnership Dba Verizon Wireless WIRELESS 05/18/2012
(301) 732- Cellco Partnership Dba Verizon Wireless WIRELESS 05/18/2012
(301) 732- Sprint Spectrum PCS 09/21/2012
(301) 734- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 736- SUITLAND Verizon Maryland 20746 WASZ 5 RBOC -
(301) 738- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC -
(301) 740- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC 04/22/2004
(301) 740- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC 04/22/2004
(301) 740- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC 04/22/2004
(301) 740- Gaithersburg Nextel Communications 20877-2412 WIRELESS 01/11/2006
(301) 740- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC 03/02/2006
(301) 740- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC 03/02/2006
(301) 741- Cellco Partnership Dba Verizon Wireless WIRELESS 07/07/2005
(301) 741- Cellco Partnership Dba Verizon Wireless WIRELESS 07/07/2005
(301) 741- Cellco Partnership Dba Verizon Wireless WIRELESS 07/07/2005
(301) 741- Cellco Partnership Dba Verizon Wireless WIRELESS 09/07/2005
(301) 741- Cellco Partnership Dba Verizon Wireless WIRELESS 09/07/2005
(301) 743- INDIAN HEAD Verizon Maryland 20640 INDIAN HEAD RBOC -
(301) 744- INDIAN HEAD Bandwidth.Com Clec 20640 CLEC 05/04/2011
(301) 744- INDIAN HEAD Bandwidth.Com Clec 20640 CLEC 12/07/2010
(301) 746- FRIENDSVILLE Verizon Maryland 21531 FRIENDSVILLE RBOC -
(301) 747- Washington Bandwidth.Com Clec 20004-1107 CLEC 09/28/2010
(301) 747- Washington Omnipoint Communications Cap Operations 20004-1107 PCS 05/19/2008
(301) 747- Washington Rnk 20004-1107 CLEC 07/21/2010
(301) 748- Frederick Nextel Communications 21702-1513 WIRELESS -
(301) 750- Core Communications CLEC 03/18/2004
(301) 750- Bandwidth.Com Clec CLEC 01/06/2012
(301) 751- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS -
(301) 753- LA PLATA Verizon Maryland 20646 LA PLATA RBOC -
(301) 755- RESTON Mci Worldcom Communications 22091 RESTON CLEC -
(301) 755- RESTON Omnipoint Communications Cap Operations 22091 PCS 08/25/2003
(301) 755- RESTON Comcast Phone Of Northern Maryland 22091 CLEC 06/20/2008
(301) 755- RESTON Omnipoint Communications Cap Operations 22091 PCS 09/13/2007
(301) 756- Laurel Tw Telecom Of Maryland 20707-6102 LAUREL CLEC -
(301) 758- Adelphi Cellco Partnership Dba Verizon Wireless 20783-1633 WIRELESS -
(301) 760- Level 3 Communications CLEC 02/27/2002
(301) 760- Verizon Maryland WASZ 2 RBOC 06/10/2004
(301) 760- Level 3 Communications CLEC 02/05/2005
(301) 760- Sprint Spectrum PCS 12/06/2005
(301) 760- Sprint Spectrum PCS 08/31/2005
(301) 761- Level 3 Communications CLEC 02/27/2002
(301) 761- Level 3 Communications CLEC 12/20/2004
(301) 762- Rockville Verizon Maryland 20850-2600 WASZ 10 - ROCKVILLE RBOC -
(301) 764- WALDORF Verizon Maryland 20601 WALDORF RBOC -
(301) 765- Bethesda Omnipoint Communications Cap Operations 20817-1948 BELTSVILLE PCS 10/16/2008
(301) 767- Bethesda Verizon Maryland 20817-1948 WASZ 2 RBOC -
(301) 767- Bethesda Cellco Partnership Dba Verizon Wireless 20817-1948 WIRELESS 03/22/2007
(301) 768- Level 3 Communications CLEC 02/27/2002
(301) 768- Omnipoint Communications Cap Operations PCS 12/03/2003
(301) 768- Omnipoint Communications Cap Operations PCS 07/15/2004
(301) 768- Omnipoint Communications Cap Operations PCS 08/09/2004
(301) 768- Omnipoint Communications Cap Operations PCS 01/13/2004
(301) 769- MILESTOWN Verizon Maryland 20650 LEONARDTOWN RBOC -
(301) 769- MILESTOWN New Cingular Wireless Pcs 20650 LEONARDTOWN WIRELESS 12/18/2003
(301) 769- MILESTOWN Xo Maryland 20650 WASHINGTON CLEC 07/20/2005
(301) 769- MILESTOWN New Cingular Wireless Pcs 20650 LEONARDTOWN WIRELESS 12/18/2003
(301) 771- Chevy Chase Verizon Maryland 20815-5205 WASZ 2 RBOC -
(301) 773- Landover Verizon Maryland 20785-2136 WASZ 4 RBOC -
(301) 775- Adelphi Cellco Partnership Dba Verizon Wireless 20783-1633 WIRELESS -
(301) 777- Cumberland Verizon Maryland 21502-3018 CUMBERLAND RBOC -
(301) 778- RESTON Mci Worldcom Communications 22091 RESTON CLEC -
(301) 778- RESTON Cbeyond Comm 22091 CLEC 05/21/2008
(301) 778- RESTON Bandwidth.Com Clec 22091 CLEC 09/28/2010
(301) 778- RESTON Rnk 22091 CLEC 03/07/2012
(301) 778- RESTON Bandwidth.Com Clec 22091 CLEC 09/28/2010
(301) 779- Hyattsville Verizon Maryland 20781-1618 HYATTSVILLE RBOC -
(301) 781- Hagerstown New Frontiers Telecommunications 21742-2545 ICO -
(301) 782- BRANDYWINE Cavalier East 20613 CLEC 12/23/2009
(301) 784- Cumberland Verizon Maryland 21502-3018 CUMBERLAND RBOC -
(301) 786- KEYSER Verizon Maryland 26726 KEYSER RBOC -
(301) 787- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 788- FREDERICK Cellco Partnership Dba Verizon Wireless 21701 WIRELESS -
(301) 789- Damascus Core Communications 20872-1829 CLEC 08/30/2002
(301) 789- Damascus Paetec Communications 20872-1829 MONTGOMERY CLEC 01/26/2005
(301) 789- Damascus Cellco Partnership Dba Verizon Wireless 20872-1829 WIRELESS 10/26/2007
(301) 789- Damascus Cellco Partnership Dba Verizon Wireless 20872-1829 WIRELESS 04/09/2007
(301) 789- Damascus Cellco Partnership Dba Verizon Wireless 20872-1829 WIRELESS 10/26/2007
(301) 790- Hagerstown Verizon Maryland 21740-5403 HAGERSTOWN RBOC -
(301) 792- Omnipoint Communications Cap Operations PCS -
(301) 794- Lanham Verizon Maryland 20706-2515 WASZ 4 RBOC -
(301) 795- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC 01/29/2008
(301) 795- Washington Omnipoint Communications Cap Operations 20011-3414 BELTSVILLE PCS 10/16/2008
(301) 797- Hagerstown Verizon Maryland 21740-5403 HAGERSTOWN RBOC -
(301) 798- Comcast Phone Of Northern Maryland CLEC 05/28/2010
(301) 799- MOUNT AIRY Core Communications 21771 CLEC 03/18/2004
(301) 799- MOUNT AIRY Comcast Phone Of Northern Maryland 21771 CLEC 12/22/2010
(301) 799- MOUNT AIRY Bandwidth.Com Clec 21771 CLEC 11/05/2008
(301) 800- Hagerstown Virginia Pcs Alliance, L.C 21740-6835 WIRELESS 04/29/2010
(301) 800- Hagerstown New Cingular Wireless Pcs 21740-6835 WIRELESS 02/28/2011
(301) 800- Hagerstown Virginia Pcs Alliance, L.C 21740-6835 WIRELESS 04/30/2010
(301) 800- Hagerstown New Cingular Wireless Pcs 21740-6835 WIRELESS 02/28/2011
(301) 800- Hagerstown Bandwidth.Com Clec 21740-6835 CLEC 05/03/2011
(301) 800- Hagerstown New Cingular Wireless Pcs 21740-6835 WIRELESS 09/29/2010
(301) 802- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 803- BETHESDA Sprint Spectrum 20014 PCS 07/17/2006
(301) 803- BETHESDA Omnipoint Communications Cap Operations 20014 PCS 04/11/2006
(301) 804- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 805- Bowie Verizon Maryland 20720-3841 WASZ 14 RBOC -
(301) 807- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 809- Bowie Verizon Maryland 20720-3841 WASZ 14 RBOC -
(301) 810- Monrovia Core Communications 21770-9020 CLEC 02/26/2004
(301) 810- Monrovia Comcast Phone Of Northern Maryland 21770-9020 CLEC 02/23/2007
(301) 811- UNKNOWN -
(301) 812- NORTH BEACH Infotelecom 20714 UNKNOWN 09/13/2012
(301) 812- NORTH BEACH Atx Telecommunications Services, Ltd 20714 CLEC 01/08/2004
(301) 814- New Cingular Wireless Pcs WIRELESS -
(301) 816- Rockville Verizon Maryland 20852-4801 WASZ 11 RBOC -
(301) 818- WALDORF Verizon Maryland 20601 WALDORF RBOC -
(301) 820- Washington At&T Local 20024-3206 WASHINGTON CLEC -
(301) 820- Washington New Cingular Wireless Pcs 20024-3206 WIRELESS 01/24/2012
(301) 820- Washington Ctc Communications Corp 20024-3206 CLEC 05/17/2011
(301) 820- Washington Cbeyond Comm 20024-3206 CLEC 06/07/2011
(301) 821- Washington At&T Local 20024-3206 WASHINGTON CLEC -
(301) 821- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS 12/05/2005
(301) 821- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS 09/07/2005
(301) 821- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS 12/05/2005
(301) 821- Washington Verizon Maryland 20024-3206 LAUREL RBOC 09/30/2005
(301) 823- Washington At&T Local 20024-3206 WASHINGTON CLEC -
(301) 823- Washington Ctc Communications Corp 20024-3206 CLEC 11/09/2012
(301) 824- SMITHSBURG Verizon Maryland 21783 SMITHSBURG RBOC -
(301) 824- SMITHSBURG Core Communications 21783 CLEC 02/27/2004
(301) 825- Washington At&T Local 20024-3206 WASHINGTON CLEC -
(301) 825- Washington Omnipoint Communications Cap Operations 20024-3206 BELTSVILLE PCS 08/20/2008
(301) 825- Washington Level 3 Communications 20024-3206 CLEC 11/28/2006
(301) 825- Washington Verizon Maryland 20024-3206 WASZ 10 - ROCKVILLE RBOC 11/09/2006
(301) 825- Washington Level 3 Communications 20024-3206 CLEC 11/28/2006
(301) 827- Bethesda Verizon Maryland 20892-0001 WASZ 2 RBOC -
(301) 828- Washington Nextel Communications 20024-3206 WIRELESS 08/31/2005
(301) 828- Washington Verizon Maryland 20024-3206 WASZ 2 RBOC 03/25/2005
(301) 828- Washington Sprint Spectrum 20024-3206 PCS 06/07/2007
(301) 828- Washington New Cingular Wireless Pcs 20024-3206 WIRELESS 02/28/2008
(301) 829- MOUNT AIRY Verizon Maryland 21771 MOUNT AIRY RBOC 10/03/2001
(301) 830- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS 07/07/2005
(301) 830- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS 07/07/2005
(301) 830- Washington Level 3 Communications 20024-3206 CLEC 12/20/2004
(301) 830- Washington Level 3 Communications 20024-3206 CLEC 08/01/2007
(301) 830- Washington Level 3 Communications 20024-3206 CLEC 02/05/2005
(301) 832- Washington At&T Local 20024-3206 WASHINGTON CLEC -
(301) 832- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS 06/03/2008
(301) 832- Washington Ctc Communications Corp 20024-3206 WASHDCMTX7X CLEC 05/25/2006
(301) 832- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS 09/03/2008
(301) 832- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS 08/05/2009
(301) 833- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC -
(301) 833- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 06/17/2008
(301) 833- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 06/17/2008
(301) 833- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 05/08/2003
(301) 833- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 05/08/2003
(301) 833- Washington Teleport Communications Group 20005-3903 WASHINGTON CLEC 05/08/2003
(301) 834- Brunswick Core Communications 21716-1301 CLEC 02/27/2004
(301) 835- Hagerstown Verizon Maryland 21740-6415 HAGERSTOWN RBOC -
(301) 836- TEMPLE HILLS Cellco Partnership Dba Verizon Wireless 20031 WIRELESS 10/04/2012
(301) 836- TEMPLE HILLS Cellco Partnership Dba Verizon Wireless 20031 WIRELESS 10/04/2012
(301) 836- TEMPLE HILLS Tw Telecom Of Maryland 20031 LAUREL CLEC 12/10/2010
(301) 836- TEMPLE HILLS Ymax Communications Corp 20031 CLEC 08/23/2010
(301) 837- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 839- OXON HILL Verizon Maryland 20021 WASZ 6 RBOC -
(301) 841- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 841- Washington Paetec Communications 20011-3414 MONTGOMERY CLEC 04/17/2007
(301) 841- Washington Level 3 Communications 20011-3414 CLEC 06/21/2007
(301) 841- Washington Level 3 Communications 20011-3414 CLEC 07/17/2007
(301) 842- CLEAR SPRING Bandwidth.Com Clec 21722 CLEC 11/05/2008
(301) 842- CLEAR SPRING Bandwidth.Com Clec 21722 CLEC 02/23/2010
(301) 842- CLEAR SPRING Bandwidth.Com Clec 21722 CLEC 05/02/2012
(301) 844- Washington Sprint Spectrum 20024-3206 WASZ 1 PCS 10/04/2011
(301) 844- Washington Sprint Spectrum 20024-3206 WASZ 1 PCS 11/23/2012
(301) 844- Washington Sprint Spectrum 20024-3206 WASZ 1 PCS 11/23/2012
(301) 844- Washington Sprint Spectrum 20024-3206 WASZ 1 PCS 11/23/2012
(301) 844- Washington Sprint Spectrum 20024-3206 WASZ 1 PCS 11/23/2012
(301) 844- Washington Sprint Spectrum 20024-3206 WASZ 1 PCS 11/23/2012
(301) 845- WALKERSVILLE Core Communications 21793 CLEC 02/27/2004
(301) 847- Beltsville Verizon Maryland 20705-1157 WASZ 13 RBOC -
(301) 849- Hagerstown New Frontiers Telecommunications 21742-2545 ICO -
(301) 850- Level 3 Communications CLEC 03/30/2006
(301) 850- Level 3 Communications CLEC 12/20/2004
(301) 850- Level 3 Communications CLEC 05/23/2002
(301) 850- Level 3 Communications CLEC 07/21/2006
(301) 851- Hyattsville Verizon Maryland 20781-1618 HYATTSVILLE RBOC -
(301) 852- Hyattsville Cellco Partnership Dba Verizon Wireless 20781-1618 WIRELESS 01/07/2010
(301) 852- Hyattsville Cellco Partnership Dba Verizon Wireless 20781-1618 WIRELESS 04/04/2011
(301) 852- Hyattsville Bandwidth.Com Clec 20781-1618 CLEC 05/28/2010
(301) 852- Hyattsville Bandwidth.Com Clec 20781-1618 CLEC 05/28/2010
(301) 852- Hyattsville Cellco Partnership Dba Verizon Wireless 20781-1618 WIRELESS 01/04/2011
(301) 854- Clarksville Verizon Maryland 21029-1228 COLUMBIA RBOC -
(301) 856- Clinton Verizon Maryland 20735-2043 WASZ 16 RBOC -
(301) 857- MOUNT AIRY Core Communications 21771 CLEC 07/18/2002
(301) 857- MOUNT AIRY Sprint Communications Company 21771 CLEC 04/18/2006
(301) 859- Frederick Level 3 Communications 21701-5672 CLEC 01/09/2002
(301) 859- Frederick Level 3 Communications 21701-5672 CLEC 01/17/2002
(301) 859- Frederick New Cingular Wireless Pcs 21701-5672 WIRELESS 10/19/2009
(301) 861- Level 3 Communications CLEC -
(301) 861- Lightwave Communications CLEC 09/08/2005
(301) 861- Level 3 Communications CLEC 09/15/2006
(301) 861- Cellco Partnership Dba Verizon Wireless WIRELESS 06/04/2007
(301) 861- Cellco Partnership Dba Verizon Wireless WIRELESS 08/02/2007
(301) 862- LEXINGTON PARK Verizon Maryland 20653 LEXINGTON PARK RBOC -
(301) 863- LEXINGTON PARK Verizon Maryland 20653 LEXINGTON PARK RBOC -
(301) 865- Verizon Maryland NEW MARKET RBOC -
(301) 867- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 869- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 871- Silver Spring Verizon Maryland 20906-2696 WASZ 11 RBOC -
(301) 873- Adelphi Cellco Partnership Dba Verizon Wireless 20783-1633 WIRELESS -
(301) 875- Laurel Cellco Partnership Dba Verizon Wireless 20707-4320 WIRELESS -
(301) 875- Laurel Cellco Partnership Dba Verizon Wireless 20707-4320 WIRELESS 07/06/2006
(301) 875- Laurel Cellco Partnership Dba Verizon Wireless 20707-4320 WIRELESS 04/02/2008
(301) 875- Laurel Cellco Partnership Dba Verizon Wireless 20707-4320 WIRELESS 04/06/2006
(301) 875- Laurel Cellco Partnership Dba Verizon Wireless 20707-4320 WIRELESS 04/06/2006
(301) 875- Laurel Cellco Partnership Dba Verizon Wireless 20707-4320 WIRELESS 04/06/2006
(301) 876- Frederick Uscoc Of Cumberland, Dba United States Cel 21701-5672 WIRELESS 02/10/2003
(301) 876- Frederick Uscoc Of Cumberland, Dba United States Cel 21701-5672 WIRELESS 02/10/2003
(301) 876- Frederick Level 3 Communications 21701-5672 CLEC 05/17/2002
(301) 876- Frederick At&T Local 21701-5672 MONROVIA CLEC 01/06/2004
(301) 876- Frederick Uscoc Of Cumberland, Dba United States Cel 21701-5672 WIRELESS 08/11/2004
(301) 877- Clinton Verizon Maryland 20735-2043 WASZ 16 RBOC -
(301) 879- Silver Spring Verizon Maryland 20904-6213 WASZ 12 RBOC -
(301) 880- Level 3 Communications CLEC 12/20/2004
(301) 880- Verizon Maryland LEXINGTON PARK RBOC 07/25/2005
(301) 880- Lightwave Communications CLEC 09/08/2005
(301) 880- Paetec Communications MONTGOMERY CLEC 11/14/2007
(301) 881- Rockville Verizon Maryland 20852-4801 WASZ 11 RBOC -
(301) 882- MOUNT AIRY Core Communications 21771 CLEC 03/19/2004
(301) 882- MOUNT AIRY Bandwidth.Com Clec 21771 CLEC 09/17/2010
(301) 882- MOUNT AIRY Comcast Phone Of Northern Maryland 21771 CLEC 02/26/2007
(301) 883- Landover Bandwidth.Com Clec 20785-2136 CLEC 01/31/2011
(301) 885- WALDORF Verizon Maryland 20601 WALDORF RBOC -
(301) 885- WALDORF Vdl, Dba Global Telecom Brokers 20601 WALDORF CLEC 02/24/2004
(301) 885- WALDORF Cellco Partnership Dba Verizon Wireless 20601 WIRELESS 10/05/2006
(301) 885- WALDORF Cellco Partnership Dba Verizon Wireless 20601 WIRELESS 11/06/2006
(301) 886- Laurel Core Communications 20707-4315 CLEC 02/26/2004
(301) 886- Laurel Atx Telecommunications Services, Ltd 20707-4315 CLEC 03/12/2003
(301) 887- Hyattsville Bandwidth.Com Clec 20781-1618 CLEC 04/20/2011
(301) 887- Hyattsville Cellco Partnership Dba Verizon Wireless 20781-1618 WIRELESS 05/18/2012
(301) 888- BADEN Peerless Network Of Maryland 20613 UNKNOWN 03/09/2012
(301) 890- Beltsville Verizon Maryland 20705-1157 WASZ 13 RBOC -
(301) 892- Hyattsville Verizon Maryland 20781-1618 WASZ 4 RBOC 03/11/2005
(301) 892- Hyattsville Cellco Partnership Dba Verizon Wireless 20781-1618 WIRELESS 08/08/2011
(301) 892- Hyattsville Bandwidth.Com Clec 20781-1618 CLEC 04/20/2011
(301) 892- Hyattsville Bandwidth.Com Clec 20781-1618 CLEC 04/20/2011
(301) 892- Hyattsville Ymax Communications Corp 20781-1618 CLEC 08/20/2010
(301) 892- Hyattsville Verizon Maryland 20781-1618 WASZ 4 RBOC 03/15/2005
(301) 893- WALDORF Bandwidth.Com Clec 20601 CLEC 04/20/2011
(301) 894- TEMPLE HILLS Verizon Maryland 20031 WASZ 5 RBOC -
(301) 895- GRANTSVILLE Bandwidth.Com Clec 21536 CLEC 01/09/2012
(301) 896- BETHESDA Verizon Maryland 20014 WASZ 2 RBOC -
(301) 898- WALKERSVILLE Verizon Maryland 21793 WALKERSVILLE RBOC -
(301) 899- TEMPLE HILLS Verizon Maryland 20031 WASZ 5 RBOC -
(301) 902- Beltsville Verizon Maryland 20705-1157 WASZ 13 RBOC -
(301) 904- Washington Cellco Partnership Dba Verizon Wireless 20024-3206 WIRELESS -
(301) 905- SILVER SPRING Bandwidth.Com Clec 20901 CLEC 04/20/2011
(301) 905- SILVER SPRING Omnipoint Communications Cap Operations 20901 WASZ 3 PCS 05/14/2003
(301) 905- SILVER SPRING Omnipoint Communications Cap Operations 20901 WASZ 3 PCS 08/25/2003
(301) 906- New Cingular Wireless Pcs WIRELESS -
(301) 908- Adelphi Cellco Partnership Dba Verizon Wireless 20783-1633 WIRELESS -
(301) 909- Washington Cellco Partnership Dba Verizon Wireless 20011-3414 WASHINGTON WIRELESS 10/10/2012
(301) 909- Washington Bandwidth.Com Clec 20011-3414 WASHINGTON CLEC 04/20/2011
(301) 909- Washington Bandwidth.Com Clec 20011-3414 WASHINGTON CLEC 04/20/2011
(301) 910- New Cingular Wireless Pcs WIRELESS -
(301) 912- ODENTON Verizon Maryland 21113 ODENTON RBOC -
(301) 914- Beltsville Mountain Communications, Dba Procom 20705-1238 12/27/2012
(301) 915- Lanham Sprint Spectrum 20706-4347 PCS 05/19/2006
(301) 915- Lanham Sprint Spectrum 20706-4347 PCS 05/19/2006
(301) 915- Lanham Atx Telecommunications Services, Ltd 20706-4347 CLEC 02/27/2004
(301) 917- Lanham Starpower Communications 20706-4347 CLEC -
(301) 917- Lanham Level 3 Communications 20706-4347 CLEC 11/21/2007
(301) 917- Lanham Omnipoint Communications Cap Operations 20706-4347 BELTSVILLE PCS 09/13/2007
(301) 917- Lanham Omnipoint Communications Cap Operations 20706-4347 BELTSVILLE PCS 01/08/2008
(301) 919- New Cingular Wireless Pcs WIRELESS -
(301) 920- Lanham Omnipoint Communications Cap Operations 20706-4347 PCS 01/06/2006
(301) 920- Lanham Omnipoint Communications Cap Operations 20706-4347 PCS 01/06/2006
(301) 920- Lanham Atx Telecommunications Services, Ltd 20706-4347 CLEC 02/10/2004
(301) 922- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 924- Olney Verizon Maryland 20832-2424 ASHTON RBOC -
(301) 926- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 928- Adelphi Cellco Partnership Dba Verizon Wireless 20783-1633 WIRELESS -
(301) 930- Silver Spring Verizon Maryland 20910-3435 WASZ 3 RBOC -
(301) 932- LA PLATA Verizon Maryland 20646 LA PLATA RBOC -
(301) 934- LA PLATA Verizon Maryland 20646 LA PLATA RBOC -
(301) 936- Washington Verizon Maryland 20024-3206 WASZ 1 RBOC -
(301) 938- Annapolis Junction Cellco Partnership Dba Verizon Wireless 20701-1104 WIRELESS -
(301) 940- Silver Spring Verizon Maryland 20904-6213 WASZ 12 RBOC -
(301) 942- Silver Spring Verizon Maryland 20906-4517 WASZ 11 RBOC -
(301) 944- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 944- Washington Cellco Partnership Dba Verizon Wireless 20011-3414 WIRELESS 06/15/2011
(301) 946- Silver Spring Verizon Maryland 20906-4517 WASZ 11 RBOC -
(301) 948- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 950- UNKNOWN -
(301) 952- UPPER MARLBORO Verizon Maryland 20772 WASZ 15 RBOC -
(301) 954- Hyattsville Verizon Maryland 20781-1618 HYATTSVILLE RBOC -
(301) 955- Washington Paetec Communications 20011-3414 CLEC 11/02/2010
(301) 955- Washington Paetec Communications 20011-3414 CLEC 11/02/2010
(301) 955- Washington Paetec Communications 20011-3414 CLEC 11/02/2010
(301) 956- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC 05/22/2002
(301) 956- Gaithersburg Paetec Communications 20877-2412 MONTGOMERY CLEC 02/02/2009
(301) 956- Gaithersburg Cellco Partnership Dba Verizon Wireless 20877-2412 WIRELESS 04/02/2009
(301) 956- Gaithersburg Cellco Partnership Dba Verizon Wireless 20877-2412 WIRELESS 01/05/2009
(301) 956- Gaithersburg Ymax Communications Corp 20877-2412 CLEC 03/03/2011
(301) 957- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 957- Washington Cellco Partnership Dba Verizon Wireless 20011-3414 WIRELESS 09/05/2007
(301) 957- Washington Cellco Partnership Dba Verizon Wireless 20011-3414 WIRELESS 08/02/2007
(301) 957- Washington Cellco Partnership Dba Verizon Wireless 20011-3414 WIRELESS 04/02/2008
(301) 959- UNKNOWN -
(301) 960- Washington Bandwidth.Com Clec 20011-3414 CLEC 04/20/2011
(301) 960- Washington Bandwidth.Com Clec 20011-3414 CLEC 04/20/2011
(301) 960- Washington Global Crossing Local Services 20011-3414 BALTIMORE CLEC 02/10/2010
(301) 961- Chevy Chase Verizon Maryland 20815-5205 WASZ 2 RBOC -
(301) 963- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 965- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 965- Washington Cbeyond Comm 20011-3414 CLEC 05/21/2008
(301) 965- Washington Broadwing Communications 20011-3414 WASZ 6 CLEC 03/28/2007
(301) 965- Washington Broadwing Communications 20011-3414 WASZ 6 CLEC 03/28/2007
(301) 966- Washington Mcimetro Access Transmission Services 20011-3414 WASHINGTON CLEC -
(301) 966- Washington Rnk 20011-3414 CLEC 07/21/2010
(301) 966- Washington Verizon Maryland 20011-3414 WASZ 12 RBOC 11/13/2012
(301) 966- Washington Rnk 20011-3414 CLEC 06/04/2012
(301) 967- SUITLAND Verizon Maryland 20746 WASZ 5 RBOC -
(301) 968- RESTON Broadview Networks 22091 UNKNOWN 06/12/2009
(301) 968- RESTON Bandwidth.Com Clec 22091 CLEC 09/17/2010
(301) 968- RESTON Tw Telecom Of Maryland 22091 LAUREL CLEC 06/28/2010
(301) 969- Comcast Phone Of Northern Maryland CLEC 03/12/2007
(301) 969- Bandwidth.Com Clec CLEC 06/07/2011
(301) 970- Annapolis Verizon Maryland 21401-7011 WASZ 14 RBOC -
(301) 971- Lanham Starpower Communications 20706-4347 CLEC -
(301) 971- Lanham Vdl, Dba Global Telecom Brokers 20706-4347 CLEC 02/24/2004
(301) 971- Lanham Broadview Networks 20706-4347 CLEC 05/16/2011
(301) 972- GERMANTOWN Verizon Maryland 20767 GAITHERSBURG RBOC -
(301) 974- Lanham Starpower Communications 20706-4347 CLEC -
(301) 974- Lanham Cellco Partnership Dba Verizon Wireless 20706-4347 WIRELESS 07/06/2006
(301) 974- Lanham Cellco Partnership Dba Verizon Wireless 20706-4347 WIRELESS 07/06/2006
(301) 974- Lanham Atx Telecommunications Services, Ltd 20706-4347 CLEC 04/14/2006
(301) 974- Lanham Cellco Partnership Dba Verizon Wireless 20706-4347 WIRELESS 02/05/2008
(301) 976- ODDBALL CODES Baltimore Washington Telephone Bwt 000000000 CLEC -
(301) 978- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 978- Gaithersburg Omnipoint Communications Cap Operations 20877-2412 BELTSVILLE PCS 05/08/2007
(301) 979- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 979- Gaithersburg Omnipoint Communications Cap Operations 20877-2412 BELTSVILLE PCS 03/24/2008
(301) 979- Gaithersburg Xo Maryland 20877-2412 GAITHERSBURG CLEC 10/25/2012
(301) 979- Gaithersburg Level 3 Communications 20877-2412 CLEC 11/28/2006
(301) 979- Gaithersburg Level 3 Communications 20877-2412 CLEC 11/28/2006
(301) 981- Laurel Tw Telecom Of Maryland 20707-6102 LAUREL CLEC -
(301) 983- Bethesda Verizon Maryland 20817-1948 WASZ 2 RBOC -
(301) 985- Hyattsville Verizon Maryland 20781-1618 HYATTSVILLE RBOC -
(301) 987- Gaithersburg Verizon Maryland 20877-2412 GAITHERSBURG RBOC -
(301) 989- Silver Spring Verizon Maryland 20904-6213 WASZ 12 RBOC -
(301) 991- Hagerstown Sprint Spectrum 21740-6835 PCS -
(301) 993- COLLEGE PARK Verizon Maryland 20741 WASZ 13 RBOC -
(301) 994- VALLEY LEE Quantum Telecommunications 20692 LEXINGTON PARK CLEC 10/23/2003
(301) 994- VALLEY LEE Atx Telecommunications Services, Ltd 20692 LEXINGTON PARK CLEC 02/27/2004
(301) 996- Beltsville Sprint Spectrum 20705-1238 PCS -
(301) 997- LEONARDTOWN Rnk 20650 CLEC 09/24/2007
(301) 997- LEONARDTOWN Cellco Partnership Dba Verizon Wireless 20650 WIRELESS 03/05/2008
(301) 997- LEONARDTOWN Cellco Partnership Dba Verizon Wireless 20650 WIRELESS 03/04/2008
(301) 997- LEONARDTOWN Cellco Partnership Dba Verizon Wireless 20650 WIRELESS 10/24/2007
(301) 998- Rockville Verizon Maryland 20852-4801 WASZ 11 RBOC -


Cities that Use 301 Area Code

Fort Washington, Mayo, Laurel, Gaithersburg, Hyattsville, Beltsville, Bethesda, Chevy Chase, Rockville, Upper Marlboro, College Park, Herndon, Williamsport, Washington, Landover, Frederick, Baltimore, Annapolis Junction, Allentown, Silver Spring, Temple Hills, Cascade, Bittinger, Nanjemoy, Damascus, Tompkinsville, Olney, Annapolis, Bowie, Mount Savage, Cumberland, Thurmont, Hughesville, Bryans Road, Mechanicsville, Myersville, Reston, Lanham, Columbia, Capitol Heights, Adelphi, Hanover, Oakland, Patuxent Naval Air Test C, Poolesville, Germantown, Piedmont, Braddock Heights, Brandywine, Hollywood, Waldorf, Alexandria, Thayerville, La Plata, Hagerstown, Smithsburg, Suitland, Keedysville, Emmitsburg, Kitzmiller, Lonaconing, Leonardtown, Flintstone, Prince Frederick, Oxon Hill, Mc Lean, Baden, Clinton, Mount Airy, Hancock, Frostburg, Cresaptown, Lexington Park, Indian Head, Friendsville, Milestown, Keyser, Monrovia, North Beach, Buckeystown, Brunswick, Clear Spring, Walkersville, Clarksville, Saint Margarets, Ridge, Galesville, Grantsville, Odenton, Oddball Codes, and Valley Lee

301 Area Code External Links