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Area Code 410 Map, Cities and Telecommunication Exchanges

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Area code 410 is located in Maryland. The following table lists the area code exchanges and switches:

410 Area Code Exchanges & Switches:

Prefix Main City Company Zip Code Switch Name Prefix Type Introduced
(410) 200- Easton Mci Worldcom Communications 21601-3015 EASTON CLEC 05/27/2004
(410) 200- Easton Cellco Partnership Dba Verizon Wireless 21601-3015 WIRELESS 09/07/2005
(410) 200- Easton Cellco Partnership Dba Verizon Wireless 21601-3015 WIRELESS 09/06/2006
(410) 200- Easton Cellco Partnership Dba Verizon Wireless 21601-3015 WIRELESS 03/06/2007
(410) 200- Easton Cellco Partnership Dba Verizon Wireless 21601-3015 WIRELESS 05/02/2007
(410) 200- Easton Mci Worldcom Communications 21601-3015 EASTON CLEC 07/07/2004
(410) 202- Cellco Partnership Dba Verizon Wireless WIRELESS 10/14/2004
(410) 202- Nextel Communications WIRELESS 01/06/2006
(410) 202- Mci Worldcom Communications EASTON CLEC 03/14/2006
(410) 202- Nextel Communications WIRELESS 04/07/2006
(410) 202- Nextel Communications WIRELESS 08/25/2006
(410) 202- Cellco Partnership Dba Verizon Wireless WIRELESS 06/04/2007
(410) 204- Baltimore Verizon Maryland 21229-5407 ARBUTUS RBOC -
(410) 205- Pikesville New Cingular Wireless Pcs 21208-5323 WIRELESS 07/03/2008
(410) 205- Pikesville Xo Maryland 21208-5323 BRYNPKLNCM CLEC 08/28/2009
(410) 205- Pikesville Bandwidth.Com Clec 21208-5323 CLEC 01/26/2010
(410) 205- Pikesville Comcast Phone Of Northern Maryland 21208-5323 CLEC 11/19/2008
(410) 205- Pikesville Bandwidth.Com Clec 21208-5323 CLEC 11/12/2008
(410) 207- Windsor Mill Cellco Partnership Dba Verizon Wireless 21244-2667 WIRELESS -
(410) 208- OCEAN PINES New Cingular Wireless Pcs 21842 WIRELESS 06/07/2011
(410) 209- Baltimore New Cingular Wireless Pcs 21202-2103 WIRELESS 03/13/2003
(410) 209- Baltimore New Cingular Wireless Pcs 21202-2103 WIRELESS 03/13/2003
(410) 211- UNKNOWN -
(410) 213- Ocean City Verizon Maryland 21842-9225 OCEAN CITY RBOC -
(410) 214- Core Communications CLEC 03/11/2009
(410) 215- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 217- Baltimore Verizon Maryland 21202-2103 BALTIMORE RBOC -
(410) 219- SALISBURY Verizon Maryland 21875 SALISBURY RBOC -
(410) 220- Bandwidth.Com Clec CLEC 11/09/2012
(410) 220- Comcast Phone Of Northern Maryland CLEC 11/12/2012
(410) 220- Sprint Spectrum PCS 10/04/2011
(410) 221- Cambridge Verizon Maryland 21613-1839 CAMBRIDGE RBOC -
(410) 223- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 225- Baltimore Verizon Maryland 21217-3803 MADISON RBOC -
(410) 226- OXFORD Idt America Corp 21654 CLEC 04/10/2006
(410) 227- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 229- Cockeysville Verizon Maryland 21030-1301 COCKEYSVILLE RBOC -
(410) 231- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 231- Columbia Bandwidth.Com Clec 21045-4716 CLEC 11/12/2008
(410) 232- Usa Mobility Wireless WIRELESS -
(410) 234- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 236- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 238- Essex Verizon Maryland 21221-3801 ESSEX RBOC -
(410) 240- Hanover Sprint Spectrum 21076-1325 PCS 10/06/2011
(410) 240- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 240- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 240- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 240- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 240- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 242- Baltimore Verizon Maryland 21229-5407 ARBUTUS RBOC -
(410) 244- Baltimore Verizon Maryland 21202-2103 BALTIMORE RBOC -
(410) 246- Mci Worldcom Communications BALTIMORE CLEC -
(410) 247- Baltimore Verizon Maryland 21229-5407 ARBUTUS RBOC -
(410) 248- PERRY HALL Vdl, Dba Global Telecom Brokers 21128 PARKVILLE CLEC 10/17/2003
(410) 249- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 251- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 253- New Cingular Wireless Pcs WIRELESS -
(410) 255- ARMIGER Verizon Maryland 21122 ARMIGER-GIBSON ISLAND RBOC -
(410) 257- NORTH BEACH Verizon Maryland 20714 NORTH BEACH RBOC -
(410) 259- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 260- Annapolis Bandwidth.Com Clec 21401-1910 CLEC 06/07/2011
(410) 261- Baltimore Verizon Maryland 21218-3910 BALTIMORE RBOC -
(410) 262- Hanover Sprint Spectrum 21076-1325 PCS -
(410) 264- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(410) 266- Annapolis Verizon Maryland 21401-7011 WASZ 14 RBOC -
(410) 268- Annapolis Verizon Maryland 21401-1910 ANNAPOLIS RBOC -
(410) 269- Annapolis Sprint Spectrum 21401-1910 PCS 08/09/2011
(410) 270- Salisbury Redi Call Communications 21804-5037 WIRELESS -
(410) 272- ABERDEEN Verizon Maryland 21001 ABERDEEN RBOC -
(410) 274- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 275- CECILTON Core Communications 21913 CLEC 03/04/2004
(410) 277- WOODLAWN Verizon Maryland 21207 WOODLAWN RBOC -
(410) 279- Windsor Mill Cellco Partnership Dba Verizon Wireless 21244-2667 WIRELESS -
(410) 281- WOODLAWN Verizon Maryland 21207 WOODLAWN RBOC -
(410) 283- Usa Mobility Wireless WIRELESS -
(410) 285- Dundalk Verizon Maryland 21222-1743 DUNDALK RBOC -
(410) 286- NORTH BEACH Level 3 Communications 20714 CLEC 06/20/2005
(410) 288- Dundalk Verizon Maryland 21222-1743 DUNDALK RBOC -
(410) 290- Columbia Verizon Maryland 21045-4602 COLUMBIA RBOC -
(410) 292- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 294- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 296- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 298- WOODLAWN Verizon Maryland 21207 WOODLAWN RBOC -
(410) 300- Sprint Spectrum PCS 07/15/2004
(410) 300- Sprint Spectrum PCS 07/20/2004
(410) 300- Sprint Spectrum PCS 12/05/2005
(410) 300- Sprint Spectrum PCS 07/20/2004
(410) 300- Sprint Spectrum PCS 07/20/2004
(410) 300- Sprint Spectrum PCS 07/15/2004
(410) 301- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 301- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 301- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 301- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 301- Hanover Sprint Spectrum 21076-1325 PCS 10/07/2011
(410) 302- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 304- Idt America Corp CLEC 03/29/2006
(410) 304- Mci Worldcom Communications EASTON CLEC 12/30/2008
(410) 304- Us Lec Of Maryland CLEC 06/29/2012
(410) 305- ODENTON Comcast Phone Of Northern Maryland 21113 CLEC 07/17/2007
(410) 305- ODENTON Level 3 Communications 21113 CLEC 09/29/2009
(410) 305- ODENTON Bandwidth.Com Clec 21113 CLEC 12/03/2009
(410) 306- ABERDEEN Comcast Phone Of Northern Maryland 21001 CLEC 02/10/2005
(410) 306- ABERDEEN Atx Telecommunications Services, Ltd 21001 ABERDEEN CLEC 02/03/2003
(410) 307- Towson Vdl, Dba Global Telecom Brokers 21204-5206 CLEC 10/17/2003
(410) 309- Columbia Verizon Maryland 21045-4602 COLUMBIA RBOC -
(410) 311- UNKNOWN -
(410) 313- Ellicott City Verizon Maryland 21042-4007 ELLICOTT CITY RBOC -
(410) 314- Baltimore Atx Telecommunications Services, Ltd 21202-4035 ROCKVILLE CLEC 02/27/2004
(410) 316- Cockeysville Verizon Maryland 21030-1301 COCKEYSVILLE RBOC -
(410) 316- Cockeysville Atx Telecommunications Services, Ltd 21030-1301 COCKEYSVILLE CLEC 01/08/2004
(410) 317- Baltimore Level 3 Communications 21202-4035 CLEC 11/08/2007
(410) 317- Baltimore Core Communications 21202-4035 CLEC 03/01/2004
(410) 317- Baltimore Broadview Networks 21202-4035 CLEC 12/23/2009
(410) 317- Baltimore Level 3 Communications 21202-4035 CLEC 04/28/2008
(410) 318- Pikesville Omnipoint Communications Cap Operations 21208-5323 BALTIMORE PCS 07/30/2004
(410) 319- Baltimore Atx Telecommunications Services, Ltd 21214-1726 CLEC 01/23/2004
(410) 321- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 323- Baltimore Verizon Maryland 21212-3606 BALTIMORE RBOC -
(410) 325- Baltimore Verizon Maryland 21206-5353 FRANKFORD RBOC -
(410) 326- Verizon Maryland SOLOMONS RBOC -
(410) 328- Baltimore Verizon Maryland 21202-2103 BALTIMORE RBOC -
(410) 330- New Cingular Wireless Pcs WIRELESS -
(410) 330- Nextel Communications WIRELESS 11/26/2002
(410) 332- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 334- SALISBURY Verizon Maryland 21875 SALISBURY RBOC -
(410) 336- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 338- Baltimore Verizon Maryland 21218-3910 BALTIMORE RBOC -
(410) 340- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 342- Baltimore Verizon Maryland 21231-1531 BALTIMORE RBOC -
(410) 343- PARKTON Core Communications 21120 CLEC 03/04/2004
(410) 343- PARKTON Atx Telecommunications Services, Ltd 21120 CLEC 01/19/2006
(410) 344- CHASE Verizon Maryland 21027 CHASE RBOC -
(410) 344- CHASE Broadwing Communications 21027 CLEC 05/14/2003
(410) 344- CHASE Level 3 Communications 21027 CLEC 12/05/2005
(410) 345- Owings Mills Verizon Maryland 21117-3849 OWINGS MILLS RBOC -
(410) 346- Westminster Level 3 Communications 21158-1531 CLEC 06/14/2011
(410) 346- Westminster Level 3 Communications 21158-1531 CLEC 02/08/2006
(410) 347- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 348- STILL POND Core Communications 21667 CLEC 03/05/2004
(410) 349- SAINT MARGARETS Verizon Maryland 21401 WASZ 14 RBOC -
(410) 349- SAINT MARGARETS New Cingular Wireless Pcs 21401 WASZ 14 WIRELESS 02/10/2004
(410) 350- BROOKLYN Verizon Maryland 21225 BROOKLYN RBOC -
(410) 350- BROOKLYN New Cingular Wireless Pcs 21225 WIRELESS 02/13/2003
(410) 350- BROOKLYN New Cingular Wireless Pcs 21225 WIRELESS 02/13/2003
(410) 351- Usa Mobility Wireless WIRELESS -
(410) 352- BISHOP Core Communications 21812 CLEC 03/04/2004
(410) 353- Windsor Mill Cellco Partnership Dba Verizon Wireless 21244-2667 WIRELESS -
(410) 355- BROOKLYN Verizon Maryland 21225 BROOKLYN RBOC -
(410) 357- PARKTON Verizon Maryland 21120 PARKTON RBOC -
(410) 357- PARKTON Comcast Phone Of Northern Maryland 21120 CLEC 04/24/2012
(410) 358- Pikesville Verizon Maryland 21208-5323 PIKESVILLE RBOC -
(410) 360- ARMIGER Verizon Maryland 21122 ARMIGER-GIBSON ISLAND RBOC -
(410) 361- Baltimore Nextel Communications 21202-2103 WIRELESS 01/26/2005
(410) 362- Baltimore Verizon Maryland 21223-1010 BALTIMORE RBOC -
(410) 364- HILLSBORO Verizon Maryland 21641 TUCKAHOE RBOC -
(410) 364- HILLSBORO Idt America Corp 21641 CLEC 04/10/2006
(410) 365- Baltimore Nextel Communications 21202-4012 WIRELESS -
(410) 367- BALTIMORE Verizon Maryland 21215 BALTIMORE RBOC -
(410) 369- Laurel Tw Telecom Of Maryland 20707-6102 LAUREL CLEC -
(410) 369- Laurel Omnipoint Communications Cap Operations 20707-6102 BALTIMORE PCS 12/14/2005
(410) 371- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 372- Baltimore At&T Local 21212-3606 BALTIMORE CLEC 11/06/2002
(410) 372- Baltimore New Cingular Wireless Pcs 21212-3606 WIRELESS 05/12/2005
(410) 374- HAMPSTEAD Verizon Maryland 21074 HAMPSTEAD RBOC -
(410) 375- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 376- VIENNA Core Communications 21869 CLEC 03/05/2004
(410) 377- Baltimore Verizon Maryland 21212-3606 BALTIMORE RBOC -
(410) 379- ELKRIDGE Verizon Maryland 21227 ELKRIDGE RBOC -
(410) 381- Columbia Verizon Maryland 21045-4602 COLUMBIA RBOC -
(410) 383- Baltimore Verizon Maryland 21217-3803 MADISON RBOC -
(410) 384- Severna Park Broadwing Communications 21146-3921 CLEC 11/06/2002
(410) 384- Severna Park Bandwidth.Com Clec 21146-3921 SEVERNA PARK CLEC 08/14/2012
(410) 385- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 387- Broadview Networks CLEC 08/12/2011
(410) 387- Cellco Partnership Dba Verizon Wireless WIRELESS 09/29/2011
(410) 387- Cellco Partnership Dba Verizon Wireless WIRELESS 09/29/2011
(410) 387- Cellco Partnership Dba Verizon Wireless WIRELESS 09/29/2011
(410) 387- Ctc Communications Corp CLEC 09/20/2011
(410) 387- Cellco Partnership Dba Verizon Wireless WIRELESS 09/29/2011
(410) 389- Usa Mobility Wireless WIRELESS -
(410) 390- New Cingular Wireless Pcs WIRELESS 08/17/2011
(410) 390- Teleport Communications Group America SALISBURY CLEC 06/11/2009
(410) 390- Ymax Communications Corp CLEC 03/07/2011
(410) 392- Elkton Verizon Maryland 21921-5537 ELKTON RBOC -
(410) 394- Verizon Maryland SOLOMONS RBOC -
(410) 394- Level 3 Communications CLEC 11/08/2011
(410) 394- Level 3 Communications CLEC 05/06/2008
(410) 395- Baltimore Verizon Maryland 21229-5407 ARBUTUS RBOC -
(410) 397- HONGA Verizon Maryland 21634 WINGATE RBOC -
(410) 398- Elkton Verizon Maryland 21921-5537 ELKTON RBOC -
(410) 399- CARDIFF Sprint Spectrum 21024 PCS 09/29/2011
(410) 399- CARDIFF Sprint Spectrum 21024 PCS 09/29/2011
(410) 400- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC 06/20/2006
(410) 400- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC 06/20/2006
(410) 400- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC 06/20/2006
(410) 400- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC 06/20/2006
(410) 400- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC 06/20/2006
(410) 401- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 401- Baltimore Peerless Network Of Maryland 21202-4035 UNKNOWN 09/17/2012
(410) 401- Baltimore Vdl, Dba Global Telecom Brokers 21202-4035 CLEC 01/21/2004
(410) 401- Baltimore Core Communications 21202-4035 CLEC 03/01/2004
(410) 402- Baltimore New Cingular Wireless Pcs 21202-4035 ROCKVILLE WIRELESS 03/24/2005
(410) 402- Baltimore New Cingular Wireless Pcs 21202-4035 ROCKVILLE WIRELESS 03/24/2005
(410) 403- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 405- Verizon Maryland FORK RBOC -
(410) 406- Baltimore Vdl, Dba Global Telecom Brokers 21202-4035 CLEC 10/17/2003
(410) 406- Baltimore Core Communications 21202-4035 CLEC 03/01/2004
(410) 406- Baltimore Atx Telecommunications Services, Ltd 21202-4035 CLEC 02/27/2004
(410) 408- Usa Mobility Wireless WIRELESS -
(410) 410- UNKNOWN -
(410) 412- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 412- Baltimore Level 3 Communications 21202-4035 CLEC 04/28/2008
(410) 412- Baltimore Vdl, Dba Global Telecom Brokers 21202-4035 ROCKVILLE CLEC 10/17/2003
(410) 413- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 414- Prince Frederick Atx Telecommunications Services, Ltd 20678-4117 CLEC 02/27/2004
(410) 415- Pikesville Level 3 Communications 21208-5323 CLEC 11/26/2008
(410) 415- Pikesville Bandwidth.Com Clec 21208-5323 CLEC 03/30/2012
(410) 417- EDGEWOOD Verizon Maryland 21040 EDGEWOOD RBOC 08/16/2007
(410) 417- EDGEWOOD Verizon Maryland 21040 EDGEWOOD RBOC 08/22/2007
(410) 417- EDGEWOOD Verizon Maryland 21040 EDGEWOOD RBOC 08/22/2007
(410) 417- EDGEWOOD Level 3 Communications 21040 CLEC 01/17/2008
(410) 417- EDGEWOOD Bandwidth.Com Clec 21040 CLEC 01/26/2010
(410) 417- EDGEWOOD Level 3 Communications 21040 CLEC 01/24/2008
(410) 419- Hanover Sprint Spectrum 21076-1325 PCS -
(410) 420- Bel Air Vdl, Dba Global Telecom Brokers 21014-3643 CLEC 01/21/2004
(410) 422- New Cingular Wireless Pcs WIRELESS -
(410) 424- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 425- SMITH ISLAND Verizon Maryland 21824 SMITH ISLAND RBOC -
(410) 426- Baltimore Verizon Maryland 21214-1726 BALTIMORE RBOC -
(410) 428- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 429- Reisterstown Bandwidth.Com Clec 21136-1024 CLEC 11/12/2008
(410) 429- Reisterstown Bandwidth.Com Clec 21136-1024 CLEC 01/26/2010
(410) 431- Severna Park Verizon Maryland 21146-3921 SEVERNA PARK RBOC -
(410) 433- Baltimore Verizon Maryland 21212-3606 BALTIMORE RBOC -
(410) 435- Baltimore Verizon Maryland 21212-3606 BALTIMORE RBOC -
(410) 436- EDGEWOOD Verizon Maryland 21040 EDGEWOOD RBOC 02/11/2005
(410) 437- ARMIGER Verizon Maryland 21122 ARMIGER-GIBSON ISLAND RBOC -
(410) 438- SUDLERSVILLE Core Communications 21668 CLEC 03/05/2004
(410) 439- ARMIGER Verizon Maryland 21122 ARMIGER-GIBSON ISLAND RBOC -
(410) 441- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 441- Columbia Mci Worldcom Communications 21045-4716 BALTIMORE CLEC 01/12/2007
(410) 441- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 09/01/2010
(410) 441- Columbia Armstrong Telecommunications 21045-4716 CLEC 06/02/2008
(410) 443- Level 3 Communications CLEC 07/23/2002
(410) 443- Cellco Partnership Dba Verizon Wireless WIRELESS 10/03/2008
(410) 443- Cellco Partnership Dba Verizon Wireless WIRELESS 02/05/2008
(410) 443- Cellco Partnership Dba Verizon Wireless WIRELESS 07/02/2009
(410) 443- Cellco Partnership Dba Verizon Wireless WIRELESS 10/02/2009
(410) 444- Baltimore Verizon Maryland 21214-1726 BALTIMORE RBOC -
(410) 446- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 448- WOODLAWN Verizon Maryland 21207 WOODLAWN RBOC -
(410) 449- Bandwidth.Com Clec CLEC 02/12/2010
(410) 449- Bandwidth.Com Clec CLEC 04/20/2011
(410) 449- Bandwidth.Com Clec CLEC 05/28/2010
(410) 449- Comcast Phone Of Northern Maryland CLEC 11/12/2012
(410) 450- Baltimore Verizon Maryland 21202-2103 BALTIMORE RBOC -
(410) 452- CARDIFF Verizon Maryland 21024 CARDIFF RBOC -
(410) 452- CARDIFF Quantum Telecommunications 21024 CARDIFF CLEC 10/22/2003
(410) 453- Cockeysville Verizon Maryland 21030-4912 COCKEYSVILLE RBOC -
(410) 455- Catonsville Verizon Maryland 21228-4642 CATONSVILLE RBOC -
(410) 457- DARLINGTON Verizon Maryland 21034 DARLINGTON RBOC -
(410) 457- DARLINGTON Infotelecom 21034 UNKNOWN 09/12/2012
(410) 457- DARLINGTON Level 3 Communications 21034 CLEC 02/06/2006
(410) 458- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 460- Usa Mobility Wireless WIRELESS -
(410) 462- Baltimore Verizon Maryland 21217-3803 MADISON RBOC -
(410) 464- Baltimore Verizon Maryland 21212-3606 BALTIMORE RBOC -
(410) 464- Baltimore Cavalier Telephone Mid Atlantic 21212-3606 CLEC 01/26/2005
(410) 466- BALTIMORE Verizon Maryland 21215 BALTIMORE RBOC -
(410) 468- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 469- Baltimore Omnipoint Communications Cap Operations 21229-5407 BALTIMORE PCS 03/20/2008
(410) 470- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC 07/08/2005
(410) 470- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC 07/08/2005
(410) 470- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC 07/08/2005
(410) 470- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC 07/08/2005
(410) 470- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC 07/08/2005
(410) 471- ELKRIDGE Verizon Maryland 21227 ELKRIDGE RBOC -
(410) 472- MANOR Level 3 Communications 21111 CLEC 03/10/2011
(410) 474- Windsor Mill Cellco Partnership Dba Verizon Wireless 21244-2667 WIRELESS -
(410) 476- TRAPPE Verizon Maryland 21673 TRAPPE RBOC -
(410) 476- TRAPPE Core Communications 21673 CLEC 03/05/2004
(410) 476- TRAPPE Cellco Partnership Dba Verizon Wireless 21673 WIRELESS 07/07/2005
(410) 478- Usa Mobility Wireless WIRELESS -
(410) 479- Denton Core Communications 21629-1212 CLEC 03/04/2004
(410) 480- Ellicott City Verizon Maryland 21042-4007 ELLICOTT CITY RBOC -
(410) 482- GREENSBORO Verizon Maryland 21639 GREENSBORO RBOC -
(410) 482- GREENSBORO Idt America Corp 21639 CLEC 04/10/2006
(410) 482- GREENSBORO Mci Worldcom Communications 21639 EASTON CLEC 12/09/2008
(410) 483- Baltimore Cavalier Telephone Mid Atlantic 21206-5353 CLEC 01/26/2005
(410) 485- Baltimore Verizon Maryland 21206-5353 FRANKFORD RBOC -
(410) 487- Mci Worldcom Communications BALTIMORE CLEC -
(410) 487- Cellco Partnership Dba Verizon Wireless WIRELESS 03/06/2007
(410) 487- Cellco Partnership Dba Verizon Wireless WIRELESS 06/04/2007
(410) 487- Comcast Phone Of Northern Maryland CLEC 04/20/2007
(410) 489- GLENWOOD Verizon Maryland 21738 GLENWOOD RBOC -
(410) 489- GLENWOOD Atx Telecommunications Services, Ltd 21738 GLENWOOD CLEC 02/03/2003
(410) 491- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 493- Hanover Sprint Spectrum 21076-1325 PCS -
(410) 495- MUTUAL Verizon Maryland 20676 PRINCE FREDERICK RBOC -
(410) 497- Comcast Phone Of Northern Maryland CLEC -
(410) 497- Omnipoint Communications Cap Operations BALTIMORE PCS 07/21/2008
(410) 497- Omnipoint Communications Cap Operations BALTIMORE PCS 01/13/2009
(410) 497- Bandwidth.Com Clec CLEC 03/22/2010
(410) 497- Bandwidth.Com Clec CLEC 09/28/2010
(410) 498- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC -
(410) 500- Verizon Maryland BALTIMORE RBOC -
(410) 500- Nextel Communications WIRELESS 03/11/2005
(410) 500- Nextel Communications WIRELESS 03/11/2005
(410) 500- Paetec Communications BALTIMORE CLEC 05/09/2005
(410) 500- Nextel Communications WIRELESS 06/15/2005
(410) 500- Verizon Maryland BALTIMORE RBOC 01/18/2005
(410) 501- Baltimore Lightwave Communications 21202-2103 CLEC 07/08/2005
(410) 501- Baltimore Level 3 Communications 21202-2103 CLEC 11/25/2005
(410) 502- Baltimore Verizon Maryland 21231-1531 BALTIMORE RBOC -
(410) 504- Owings Mills Verizon Maryland 21117-3849 OWINGS MILLS RBOC -
(410) 504- Owings Mills New Cingular Wireless Pcs 21117-3849 WIRELESS 03/09/2005
(410) 504- Owings Mills New Cingular Wireless Pcs 21117-3849 WIRELESS 03/09/2005
(410) 504- Owings Mills Level 3 Communications 21117-3849 CLEC 09/27/2005
(410) 504- Owings Mills New Cingular Wireless Pcs 21117-3849 WIRELESS 04/30/2007
(410) 505- Columbia Vdl, Dba Global Telecom Brokers 21045-4602 CLEC 01/21/2004
(410) 505- Columbia Core Communications 21045-4602 CLEC 03/01/2004
(410) 505- Columbia Broadwing Communications 21045-4602 CLEC 07/01/2002
(410) 505- Columbia Atx Telecommunications Services, Ltd 21045-4602 CLEC 02/27/2004
(410) 506- Elkton Verizon Maryland 21921-5537 ELKTON RBOC 11/15/2002
(410) 506- Elkton Verizon Maryland 21921-5537 ELKTON RBOC 11/15/2002
(410) 508- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 510- Baltimore Teleport Communications Group America 21201-3330 BALTIMORE CLEC -
(410) 510- Baltimore Core Communications 21201-3330 CLEC 03/01/2004
(410) 511- UNKNOWN -
(410) 512- Towson Broadwing Communications 21204-5206 CLEC 06/14/2006
(410) 513- Baltimore Comcast Phone Of Northern Maryland 21201-3330 CLEC 11/20/2007
(410) 513- Baltimore Bandwidth.Com Clec 21201-3330 CLEC 11/02/2010
(410) 514- DORRS CORNER Atx Telecommunications Services, Ltd 21108 CLEC 02/03/2003
(410) 514- DORRS CORNER Core Communications 21108 CLEC 03/04/2004
(410) 514- DORRS CORNER Level 3 Communications 21108 CLEC 09/26/2005
(410) 514- DORRS CORNER Broadwing Communications 21108 CLEC 04/11/2005
(410) 516- Baltimore Verizon Maryland 21218-3910 BALTIMORE RBOC -
(410) 517- Reisterstown Verizon Maryland 21136-1024 REISTERSTOWN RBOC -
(410) 517- Reisterstown Vdl, Dba Global Telecom Brokers 21136-1024 REISTERSTOWN CLEC 10/17/2003
(410) 518- Severna Park Verizon Maryland 21146-3921 SEVERNA PARK RBOC -
(410) 520- OCEAN CITY Verizon Maryland 21842 NORTH OCEAN CITY RBOC -
(410) 521- Randallstown Verizon Maryland 21133-5205 RANDALLSTOWN RBOC -
(410) 522- Baltimore Omnipoint Communications Cap Operations 21231-1531 BALTIMORE PCS 08/17/2005
(410) 524- OCEAN CITY Verizon Maryland 21842 NORTH OCEAN CITY RBOC -
(410) 526- Reisterstown Verizon Maryland 21136-1024 REISTERSTOWN RBOC -
(410) 528- Baltimore Verizon Maryland 21202-2103 BALTIMORE RBOC -
(410) 529- PERRY HALL Verizon Maryland 21128 PARKVILLE RBOC -
(410) 531- Clarksville Verizon Maryland 21029-1228 COLUMBIA RBOC -
(410) 533- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 535- Prince Frederick Verizon Maryland 20678-4117 PRINCE FREDERICK RBOC -
(410) 537- Baltimore Verizon Maryland 21231-1531 RBOC -
(410) 538- EDGEWOOD Verizon Maryland 21040 EDGEWOOD RBOC -
(410) 539- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 541- Severna Park Verizon Maryland 21146-3921 SEVERNA PARK RBOC -
(410) 541- Severna Park Bandwidth.Com Clec 21146-3921 CLEC 11/12/2008
(410) 542- BALTIMORE Verizon Maryland 21215 BALTIMORE RBOC -
(410) 544- Severna Park Verizon Maryland 21146-3921 SEVERNA PARK RBOC -
(410) 546- SALISBURY Verizon Maryland 21875 SALISBURY RBOC -
(410) 548- SALISBURY Verizon Maryland 21875 SALISBURY RBOC -
(410) 550- Verizon Maryland BALTIMORE RBOC -
(410) 552- SYKESVILLE Verizon Maryland 21784 SYKESVILLE RBOC -
(410) 553- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 555- Baltimore Verizon Maryland 21202-2103 BALTIMORE RBOC -
(410) 556- Chestertown Core Communications 21620-1615 CLEC 03/04/2004
(410) 557- JARRETTSVILLE Verizon Maryland 21084 JARRETTSVILLE RBOC -
(410) 557- JARRETTSVILLE Baltimore Washington Telephone Bwt 21084 CLEC 04/17/2006
(410) 558- Baltimore Xo Maryland 21231-1531 BRYNPKLNCM CLEC 01/13/2005
(410) 559- Baltimore Teleport Communications Group America 21201-3330 BALTIMORE CLEC -
(410) 561- Cockeysville Verizon Maryland 21030-4912 COCKEYSVILLE RBOC -
(410) 562- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 564- Baltimore Teleport Communications Group America 21201-3330 BALTIMORE CLEC -
(410) 564- Baltimore Sprint Spectrum 21201-3330 BALTIMORE PCS 09/29/2011
(410) 564- Baltimore Sprint Spectrum 21201-3330 PCS 06/26/2007
(410) 564- Baltimore Sprint Spectrum 21201-3330 PCS 06/26/2007
(410) 565- Laurel Tw Telecom Of Maryland 20707-6102 LAUREL CLEC -
(410) 565- Laurel Comcast Phone Of Northern Maryland 20707-6102 CLEC 04/10/2009
(410) 567- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 567- Baltimore Core Communications 21202-4035 CLEC 03/01/2004
(410) 567- Baltimore Sprint Spectrum 21202-4035 PCS 09/07/2011
(410) 568- Baltimore Teleport Communications Group America 21201-3330 BALTIMORE CLEC -
(410) 569- BEL AIR Verizon Maryland 21014 FORK RBOC -
(410) 571- Annapolis Verizon Maryland 21401-7011 WASZ 14 RBOC -
(410) 571- Annapolis Comcast Phone Of Northern Maryland 21401-7011 CLEC 02/10/2005
(410) 573- Annapolis Verizon Maryland 21401-7011 WASZ 14 RBOC -
(410) 575- ABERDEEN Verizon Maryland 21001 ABERDEEN RBOC -
(410) 575- ABERDEEN Bandwidth.Com Clec 21001 CLEC 11/12/2008
(410) 576- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 577- Owings Mills Verizon Maryland 21117-3849 OWINGS MILLS RBOC 05/12/2005
(410) 577- Owings Mills Verizon Maryland 21117-3849 OWINGS MILLS RBOC 05/12/2005
(410) 577- Owings Mills Verizon Maryland 21117-3849 OWINGS MILLS RBOC 05/12/2005
(410) 577- Owings Mills Verizon Maryland 21117-3849 OWINGS MILLS RBOC 05/12/2005
(410) 577- Owings Mills Verizon Maryland 21117-3849 OWINGS MILLS RBOC 05/12/2005
(410) 578- BALTIMORE Verizon Maryland 21215 BALTIMORE RBOC -
(410) 580- Pikesville Verizon Maryland 21208-5323 PIKESVILLE RBOC -
(410) 582- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 583- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 585- Pikesville Verizon Maryland 21208-5323 PIKESVILLE RBOC -
(410) 585- Pikesville New Cingular Wireless Pcs 21208-5323 PIKESVILLE WIRELESS 02/13/2003
(410) 585- Pikesville New Cingular Wireless Pcs 21208-5323 PIKESVILLE WIRELESS 12/11/2003
(410) 585- Pikesville Cavalier Telephone Mid Atlantic 21208-5323 CLEC 01/26/2005
(410) 587- Baltimore Verizon Maryland 21229-5407 ARBUTUS RBOC -
(410) 588- Bel Air Nextel Communications 21014-3643 BEL AIR WIRELESS 05/12/2004
(410) 588- Bel Air Nextel Communications 21014-3643 WIRELESS 08/23/2005
(410) 589- Laurel Level 3 Communications 20707-6102 CLEC 03/24/2008
(410) 590- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 592- Verizon Maryland FORK RBOC -
(410) 593- FORK Comcast Phone Of Northern Maryland 21051 CLEC 11/18/2011
(410) 595- Laurel Tw Telecom Of Maryland 20707-6102 LAUREL CLEC -
(410) 595- Laurel Level 3 Communications 20707-6102 CLEC 04/28/2008
(410) 595- Laurel Comcast Phone Of Northern Maryland 20707-6102 CLEC 09/12/2006
(410) 597- WOODLAWN Verizon Maryland 21207 WOODLAWN RBOC -
(410) 599- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 600- Sprint Communications Company CLEC 04/28/2006
(410) 600- New Cingular Wireless Pcs WIRELESS 11/06/2007
(410) 602- Pikesville Verizon Maryland 21208-5323 PIKESVILLE RBOC -
(410) 604- Verizon Maryland STEVENSVILLE RBOC -
(410) 604- At&T Local BALTIMORE CLEC 06/13/2007
(410) 606- Beltsville Verizon Maryland 20705-1378 MUIRKIRK RBOC -
(410) 608- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 609- BROOKLYN Level 3 Communications 21225 CLEC 01/12/2005
(410) 609- BROOKLYN Level 3 Communications 21225 CLEC 02/24/2006
(410) 609- BROOKLYN Atx Telecommunications Services, Ltd 21225 BROOKLYN CLEC 02/03/2003
(410) 611- UNKNOWN -
(410) 613- Baltimore Verizon Maryland 21202-2103 BALTIMORE RBOC -
(410) 615- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 616- Atx Telecommunications Services, Ltd CLEC 02/03/2003
(410) 617- Baltimore Verizon Maryland 21212-3606 BALTIMORE RBOC -
(410) 618- Salisbury Infotelecom 21804-5037 UNKNOWN 09/12/2012
(410) 618- Salisbury Idt America Corp 21804-5037 SALISBURY CLEC 11/09/2011
(410) 618- Salisbury Cellco Partnership Dba Verizon Wireless 21804-5037 WIRELESS 09/06/2012
(410) 618- Salisbury Cellco Partnership Dba Verizon Wireless 21804-5037 WIRELESS 09/06/2012
(410) 618- Salisbury Cellco Partnership Dba Verizon Wireless 21804-5037 WIRELESS 05/18/2012
(410) 619- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(410) 621- Verizon Maryland PRINCESS ANNE RBOC -
(410) 621- Verizon Maryland PRINCESS ANNE RBOC 04/30/2002
(410) 621- Comcast Phone Of Northern Maryland CLEC 06/20/2006
(410) 622- Mci Worldcom Communications BALTIMORE CLEC 08/12/2011
(410) 622- Sprint Spectrum PCS 08/18/2011
(410) 622- Mci Worldcom Communications BALTIMORE CLEC 08/15/2011
(410) 622- Sprint Spectrum PCS 08/18/2011
(410) 622- Sprint Spectrum PCS 08/18/2011
(410) 622- Sprint Spectrum PCS 08/18/2011
(410) 623- MARION Core Communications 21838 CLEC 03/04/2004
(410) 624- Baltimore Paetec Communications 21223-1010 BALTIMORE CLEC 05/12/2004
(410) 624- Baltimore New Cingular Wireless Pcs 21223-1010 WIRELESS 04/15/2003
(410) 625- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 627- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 629- Verizon Maryland BERLIN RBOC -
(410) 629- Ymax Communications Corp CLEC 03/07/2011
(410) 629- Ymax Communications Corp CLEC 03/07/2011
(410) 630- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 630- Baltimore Xo Maryland 21202-4035 BRYNPKLNCM CLEC 11/15/2005
(410) 630- Baltimore Xo Maryland 21202-4035 BRYNPKLNCM CLEC 07/19/2005
(410) 630- Baltimore Xo Maryland 21202-4035 BRYNPKLNCM CLEC 07/19/2005
(410) 630- Baltimore Xo Maryland 21202-4035 BRYNPKLNCM CLEC 07/19/2005
(410) 631- Dundalk Verizon Maryland 21222-1743 DUNDALK RBOC -
(410) 632- SNOW HILL Core Communications 21863 CLEC 03/05/2004
(410) 634- HILLSBORO Verizon Maryland 21641 TUCKAHOE RBOC -
(410) 634- HILLSBORO Idt America Corp 21641 CLEC 05/02/2012
(410) 634- HILLSBORO Verizon Maryland 21641 TUCKAHOE RBOC 11/17/2003
(410) 635- NEW WINDSOR Bandwidth.Com Clec 21776 CLEC 07/19/2011
(410) 635- NEW WINDSOR Bandwidth.Com Clec 21776 CLEC 11/12/2008
(410) 635- NEW WINDSOR Broadview Networks 21776 CLEC 01/05/2010
(410) 636- BROOKLYN Verizon Maryland 21225 BROOKLYN RBOC -
(410) 637- Baltimore Nextel Communications 21202-2103 WIRELESS 08/26/2005
(410) 639- ROCK HALL Verizon Maryland 21790 ROCK HALL RBOC -
(410) 639- ROCK HALL Idt America Corp 21790 CLEC 04/10/2006
(410) 641- BERLIN Verizon Maryland 21811 RBOC -
(410) 643- ROMANCOKE Verizon Maryland 21666 ROMANCOKE RBOC -
(410) 645- Mci Worldcom Communications BALTIMORE CLEC -
(410) 645- Vdl, Dba Global Telecom Brokers CLEC 01/21/2004
(410) 645- Tw Telecom Of Maryland LAUREL CLEC 05/03/2006
(410) 646- Baltimore Verizon Maryland 21229-5407 ARBUTUS RBOC -
(410) 648- GALENA Verizon Maryland 21635 GALENA RBOC -
(410) 648- GALENA Idt America Corp 21635 CLEC 04/10/2006
(410) 648- GALENA Comcast Phone Of Northern Maryland 21635 CLEC 06/20/2006
(410) 649- Baltimore Nextel Communications 21201-3330 WIRELESS 08/26/2005
(410) 650- Baltimore Vdl, Dba Global Telecom Brokers 21202-4035 CLEC 10/17/2003
(410) 650- Baltimore Bandwidth.Com Clec 21202-4035 CLEC 10/20/2004
(410) 651- Verizon Maryland PRINCESS ANNE RBOC -
(410) 653- Pikesville Verizon Maryland 21208-5323 PIKESVILLE RBOC -
(410) 655- Randallstown Verizon Maryland 21133-5205 RANDALLSTOWN RBOC -
(410) 656- Armstrong Telecommunications CLEC 05/30/2008
(410) 656- Bandwidth.Com Clec CLEC 12/13/2010
(410) 656- Bandwidth.Com Clec CLEC 01/26/2010
(410) 656- Infotelecom UNKNOWN 09/11/2012
(410) 657- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 657- Baltimore Bandwidth.Com Clec 21202-4035 CLEC 04/20/2011
(410) 658- RISING SUN Armstrong Telephone Co. Of Maryland 21911 RISING SUN ICO -
(410) 660- Sprint Spectrum PCS 07/31/2006
(410) 660- Sprint Spectrum PCS 09/02/2008
(410) 660- Sprint Spectrum PCS 10/15/2009
(410) 660- Sprint Spectrum PCS 12/13/2006
(410) 660- Sprint Spectrum PCS 12/13/2006
(410) 660- Sprint Spectrum PCS 08/04/2006
(410) 662- Baltimore Verizon Maryland 21218-3910 BALTIMORE RBOC -
(410) 662- Baltimore Nextel Communications 21218-3910 WIRELESS 09/07/2005
(410) 664- BALTIMORE Verizon Maryland 21215 BALTIMORE RBOC -
(410) 666- Cockeysville Verizon Maryland 21030-4912 COCKEYSVILLE RBOC -
(410) 668- Parkville Verizon Maryland 21234-4124 PARKVILLE RBOC -
(410) 670- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 670- Baltimore Comcast Phone Of Northern Maryland 21202-4035 CLEC 05/09/2012
(410) 670- Baltimore Bandwidth.Com Clec 21202-4035 CLEC 07/16/2012
(410) 670- Baltimore Level 3 Communications 21202-4035 CLEC 04/13/2006
(410) 671- EDGEWOOD Comcast Phone Of Northern Maryland 21040 CLEC 06/08/2011
(410) 671- EDGEWOOD Bandwidth.Com Clec 21040 CLEC 11/02/2010
(410) 673- PRESTON Verizon Maryland 21655 PRESTON RBOC -
(410) 673- PRESTON Comcast Phone Of Northern Maryland 21655 CLEC 06/20/2006
(410) 675- Baltimore Verizon Maryland 21231-1531 BALTIMORE RBOC -
(410) 677- SALISBURY Verizon Maryland 21875 SALISBURY RBOC -
(410) 679- EDGEWOOD Verizon Maryland 21040 EDGEWOOD RBOC -
(410) 680- Laurel Ymax Communications Corp 20707-6102 BRYNPKLNCM CLEC 09/15/2009
(410) 681- Usa Mobility Wireless WIRELESS -
(410) 683- Cockeysville Verizon Maryland 21030-4912 COCKEYSVILLE RBOC -
(410) 685- Baltimore Verizon Maryland 21202-2103 BALTIMORE RBOC -
(410) 687- Essex Verizon Maryland 21221-3801 ESSEX RBOC -
(410) 689- Baltimore Teleport Communications Group America 21201-3330 BALTIMORE CLEC -
(410) 689- Baltimore Omnipoint Communications Cap Operations 21201-3330 PCS 10/17/2007
(410) 690- WYE MILLS At&T Local 21679 BALTIMORE CLEC 05/20/2002
(410) 690- WYE MILLS Nextel Communications 21679 WIRELESS 02/04/2004
(410) 690- WYE MILLS Level 3 Communications 21679 CLEC 05/18/2004
(410) 690- WYE MILLS Nextel Communications 21679 WIRELESS 04/20/2006
(410) 690- WYE MILLS Level 3 Communications 21679 CLEC 08/03/2009
(410) 691- BALT WA INTL ARPT Verizon Maryland 21240 FRIENDSHIP RBOC -
(410) 691- BALT WA INTL ARPT Atx Telecommunications Services, Ltd 21240 FRIENDSHIP CLEC 02/03/2003
(410) 692- JARRETTSVILLE Core Communications 21084 CLEC 03/01/2004
(410) 692- JARRETTSVILLE Bandwidth.Com Clec 21084 CLEC 08/05/2010
(410) 694- BALT WA INTL ARPT Verizon Maryland 21240 FRIENDSHIP RBOC -
(410) 695- Level 3 Communications CLEC 03/31/2005
(410) 695- Comcast Phone Of Northern Maryland CLEC 02/11/2005
(410) 695- Level 3 Communications CLEC 07/05/2012
(410) 696- Baltimore Comcast Phone Of Northern Maryland 21202-4035 CLEC 02/11/2005
(410) 696- Baltimore Level 3 Communications 21202-4035 CLEC 09/29/2009
(410) 696- Baltimore Level 3 Communications 21202-4035 CLEC 05/06/2008
(410) 697- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 697- Baltimore Broadwing Communications 21202-4035 CLEC 06/20/2003
(410) 697- Baltimore Level 3 Communications 21202-4035 CLEC 01/16/2004
(410) 697- Baltimore Xo Maryland 21202-4035 CLEC 12/13/2005
(410) 697- Baltimore Atx Telecommunications Services, Ltd 21202-4035 CLEC 03/07/2006
(410) 698- Baltimore Atx Telecommunications Services, Ltd 21202-4035 CLEC 02/03/2003
(410) 698- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 04/21/2004
(410) 698- Baltimore Level 3 Communications 21202-4035 CLEC 07/29/2003
(410) 698- Baltimore Level 3 Communications 21202-4035 CLEC 12/16/2004
(410) 698- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 08/18/2004
(410) 700- UNKNOWN -
(410) 701- Baltimore Bandwidth.Com Clec 21202-4035 CLEC 11/12/2008
(410) 701- Baltimore Verizon Maryland 21202-4035 RANDALLSTOWN RBOC 04/09/2003
(410) 701- Baltimore Cavalier Telephone Mid Atlantic 21202-4035 CLEC 04/02/2009
(410) 701- Baltimore Comcast Phone Of Northern Maryland 21202-4035 CLEC 06/19/2007
(410) 702- Baltimore Nextel Communications 21202-4035 WIRELESS 01/08/2004
(410) 702- Baltimore Core Communications 21202-4035 CLEC 03/04/2004
(410) 702- Baltimore Level 3 Communications 21202-4035 CLEC 07/29/2003
(410) 702- Baltimore Broadview Networks 21202-4035 CLEC 08/10/2009
(410) 703- Windsor Mill Cellco Partnership Dba Verizon Wireless 21244-2667 WIRELESS -
(410) 705- Beltsville Verizon Maryland 20705-1378 MUIRKIRK RBOC -
(410) 705- Beltsville Ymax Communications Corp 20705-1378 CLEC 04/28/2008
(410) 705- Beltsville Ymax Communications Corp 20705-1378 CLEC 06/29/2007
(410) 707- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 709- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 709- Baltimore Core Communications 21202-4035 CLEC 03/04/2004
(410) 709- Baltimore Broadview Networks 21202-4035 CLEC 09/29/2008
(410) 710- Baltimore Omnipoint Communications Cap Operations 21202-2103 BALTIMORE PCS 10/03/2005
(410) 710- Baltimore Nextel Communications 21202-2103 WIRELESS 12/08/2005
(410) 710- Baltimore Nextel Communications 21202-2103 WIRELESS 12/08/2005
(410) 710- Baltimore Nextel Communications 21202-2103 WIRELESS 12/08/2005
(410) 710- Baltimore Omnipoint Communications Cap Operations 21202-2103 BALTIMORE PCS 01/06/2006
(410) 710- Baltimore Omnipoint Communications Cap Operations 21202-2103 BALTIMORE PCS 10/10/2005
(410) 712- Hanover Verizon Maryland 21076-1325 PARKWAY RBOC -
(410) 713- New Cingular Wireless Pcs WIRELESS 03/14/2003
(410) 713- Cellco Partnership Dba Verizon Wireless WIRELESS 05/07/2004
(410) 713- Level 3 Communications CLEC 08/25/2002
(410) 713- Nextel Communications WIRELESS 01/27/2004
(410) 713- Cellco Partnership Dba Verizon Wireless WIRELESS 06/02/2005
(410) 714- New Cingular Wireless Pcs WIRELESS -
(410) 716- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 717- Laurel Sprint Spectrum 20707-6102 PCS 09/07/2011
(410) 717- Laurel Sprint Spectrum 20707-6102 PCS 09/07/2011
(410) 717- Laurel Sprint Spectrum 20707-6102 PCS 11/27/2009
(410) 718- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 03/24/2005
(410) 720- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(410) 720- Columbia Ymax Communications Corp 21044-1741 CLEC 07/24/2007
(410) 722- Beltsville Verizon Maryland 20705-1378 MUIRKIRK RBOC -
(410) 724- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(410) 725- SALISBURY Sprint Spectrum 21875 PCS -
(410) 725- SALISBURY Sprint Spectrum 21875 PCS 08/10/2007
(410) 725- SALISBURY Sprint Spectrum 21875 PCS 07/02/2004
(410) 726- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 728- Baltimore Verizon Maryland 21217-3803 MADISON RBOC -
(410) 730- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(410) 732- Baltimore Verizon Maryland 21231-1531 BALTIMORE RBOC -
(410) 734- CHURCHVILLE Verizon Maryland 21028 CHURCHVILLE RBOC -
(410) 734- CHURCHVILLE Armstrong Telecommunications 21028 CLEC 08/11/2008
(410) 735- Hanover Verizon Maryland 21076-3103 BEL AIR RBOC 08/29/2003
(410) 735- Hanover Verizon Maryland 21076-3103 BEL AIR RBOC 08/12/2003
(410) 736- Baltimore New Cingular Wireless Pcs 21202-2103 WIRELESS 01/08/2003
(410) 736- Baltimore New Cingular Wireless Pcs 21202-2103 WIRELESS 01/08/2003
(410) 736- Baltimore New Cingular Wireless Pcs 21202-2103 WIRELESS 01/08/2003
(410) 737- Baltimore Verizon Maryland 21229-5407 ARBUTUS RBOC -
(410) 739- New Cingular Wireless Pcs WIRELESS -
(410) 739- Cellco Partnership Dba Verizon Wireless WIRELESS 08/02/2005
(410) 741- UPPER MARLBORO Verizon Maryland 20772 WASZ 15 RBOC -
(410) 741- UPPER MARLBORO Xo Maryland 20772 BRYNPKLNCM CLEC 06/16/2004
(410) 741- UPPER MARLBORO Teleport Communications Group America 20772 BALTIMORE CLEC 07/05/2006
(410) 743- Usa Mobility Wireless WIRELESS -
(410) 745- SAINT MICHAELS Verizon Maryland 21663 ST. MICHAELS RBOC -
(410) 745- SAINT MICHAELS Teleport Communications Group America 21663 CLEC 06/20/2012
(410) 746- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 748- Usa Mobility Wireless WIRELESS -
(410) 750- Ellicott City Verizon Maryland 21042-4007 ELLICOTT CITY RBOC -
(410) 752- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 753- Level 3 Communications CLEC 12/16/2004
(410) 753- Level 3 Communications CLEC 01/27/2003
(410) 753- Atx Telecommunications Services, Ltd CLEC 02/03/2003
(410) 754- Federalsburg Core Communications 21632-1005 CLEC 03/04/2004
(410) 755- CECILTON Verizon Maryland 21913 CECILTON RBOC -
(410) 755- CECILTON Core Communications 21913 CLEC 03/05/2004
(410) 756- TANEYTOWN Verizon Maryland 21787 TANEYTOWN RBOC -
(410) 756- TANEYTOWN Vdl, Dba Global Telecom Brokers 21787 CLEC 01/21/2004
(410) 758- Verizon Maryland CENTREVILLE RBOC -
(410) 760- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 762- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 762- Glen Burnie Us Lec Of Maryland 21061-3033 COLUMBIA CLEC 10/20/2004
(410) 764- Pikesville Verizon Maryland 21208-5323 PIKESVILLE RBOC -
(410) 766- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 768- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 770- Easton Verizon Maryland 21601-3015 EASTON RBOC -
(410) 772- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(410) 773- Cockeysville Quantum Telecommunications 21030-1301 COCKEYSVILLE CLEC 10/22/2003
(410) 774- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 774- Baltimore Level 3 Communications 21202-4035 CLEC 02/23/2006
(410) 774- Baltimore Level 3 Communications 21202-4035 CLEC 07/29/2003
(410) 774- Baltimore Bandwidth.Com Clec 21202-4035 CLEC 01/26/2010
(410) 774- Baltimore Atx Telecommunications Services, Ltd 21202-4035 CLEC 02/03/2003
(410) 775- UNION BRIDGE Baltimore Washington Telephone Bwt 21791 CLEC 04/12/2006
(410) 775- UNION BRIDGE Bandwidth.Com Clec 21791 CLEC 11/12/2008
(410) 776- Baltimore Teleport Communications Group America 21201-3330 BALTIMORE CLEC -
(410) 776- Baltimore Sprint Spectrum 21201-3330 PCS 08/16/2011
(410) 776- Baltimore Sprint Spectrum 21201-3330 PCS 08/16/2011
(410) 776- Baltimore Ctc Communications Corp 21201-3330 BALTIMORE CLEC 03/09/2005
(410) 776- Baltimore Sprint Spectrum 21201-3330 BALTIMORE PCS 08/16/2011
(410) 777- Baltimore Sprint Spectrum 21202-4035 PCS 08/09/2011
(410) 777- Baltimore Level 3 Communications 21202-4035 CLEC 09/26/2005
(410) 777- Baltimore Level 3 Communications 21202-4035 CLEC 09/26/2005
(410) 779- Baltimore Level 3 Communications 21201-3418 BALTIMORE CLEC -
(410) 779- Baltimore Nextel Communications 21201-3418 WIRELESS 01/12/2006
(410) 780- Essex Verizon Maryland 21221-3801 ESSEX RBOC -
(410) 781- SYKESVILLE Baltimore Washington Telephone Bwt 21784 CLEC 04/17/2006
(410) 782- Hanover Verizon Maryland 21076-1325 PARKWAY RBOC -
(410) 782- Hanover Sprint Spectrum 21076-1325 PCS 05/01/2006
(410) 782- Hanover Atx Telecommunications Services, Ltd 21076-1325 PARKWAY CLEC 02/03/2003
(410) 782- Hanover Vdl, Dba Global Telecom Brokers 21076-1325 PARKWAY CLEC 01/21/2004
(410) 783- Baltimore Verizon Maryland 21202-2103 CHARLES STREET 2 RBOC -
(410) 784- DEAL ISLAND Core Communications 21821 CLEC 03/04/2004
(410) 785- Cockeysville Verizon Maryland 21030-1301 COCKEYSVILLE RBOC -
(410) 787- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 789- BROOKLYN Verizon Maryland 21225 BROOKLYN RBOC -
(410) 791- Beltsville Verizon Maryland 20705-1378 MUIRKIRK RBOC -
(410) 793- CROFTON Verizon Maryland 21114 CROFTON RBOC -
(410) 793- CROFTON Sprint Spectrum 21114 PCS 08/09/2011
(410) 793- CROFTON Comcast Phone Of Northern Maryland 21114 CLEC 02/11/2005
(410) 793- CROFTON Bandwidth.Com Clec 21114 CLEC 01/26/2010
(410) 793- CROFTON Sprint Spectrum 21114 PCS 08/09/2011
(410) 794- Laurel Baltimore Washington Telephone Bwt 20707-6102 CLEC 04/17/2006
(410) 795- SYKESVILLE Verizon Maryland 21784 SYKESVILLE RBOC -
(410) 797- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(410) 799- ELKRIDGE Verizon Maryland 21227 ELKRIDGE RBOC -
(410) 800- Baltimore Cavalier Telephone Mid Atlantic 21202-2103 CLEC 10/06/2004
(410) 800- Baltimore Comcast Phone Of Northern Maryland 21202-2103 CLEC 02/10/2005
(410) 800- Baltimore Paetec Communications 21202-2103 BALTIMORE CLEC 08/15/2005
(410) 800- Baltimore Nextel Communications 21202-2103 WIRELESS 04/14/2005
(410) 800- Baltimore Cellco Partnership Dba Verizon Wireless 21202-2103 WIRELESS 08/02/2005
(410) 801- Baltimore Verizon Maryland 21229-5407 ARBUTUS RBOC -
(410) 803- Bel Air Verizon Maryland 21014-3643 BEL AIR RBOC -
(410) 803- Bel Air Bandwidth.Com Clec 21014-3643 CLEC 07/05/2011
(410) 804- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 805- Hanover Sprint Spectrum 21076-1325 PCS 08/26/2011
(410) 805- Hanover Sprint Spectrum 21076-1325 PCS 08/26/2011
(410) 805- Hanover Sprint Spectrum 21076-1325 PCS 08/26/2011
(410) 805- Hanover Sprint Spectrum 21076-1325 PCS 08/26/2011
(410) 805- Hanover Sprint Spectrum 21076-1325 PCS 08/26/2011
(410) 806- Usa Mobility Wireless WIRELESS -
(410) 807- Laurel New Cingular Wireless Pcs 20707-6102 WIRELESS 03/24/2005
(410) 807- Laurel New Cingular Wireless Pcs 20707-6102 WIRELESS 03/24/2005
(410) 807- Laurel Baltimore Washington Telephone Bwt 20707-6102 CLEC 04/17/2006
(410) 807- Laurel New Cingular Wireless Pcs 20707-6102 WIRELESS 03/24/2005
(410) 809- Bel Air Cavalier Telephone, (Mid Atlantic) 21014-3643 CLEC -
(410) 809- Bel Air Verizon Maryland 21014-3643 BEL AIR RBOC 05/11/2005
(410) 810- Chestertown New Cingular Wireless Pcs 21620-1615 WIRELESS 11/06/2006
(410) 812- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 814- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC 09/30/2005
(410) 814- Hanover Omnipoint Communications Cap Operations 21076-3103 BALTIMORE PCS 11/23/2005
(410) 814- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC 10/04/2005
(410) 814- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC 10/04/2005
(410) 814- Hanover Cavalier Telephone Mid Atlantic 21076-3103 CLEC 10/04/2005
(410) 814- Hanover Omnipoint Communications Cap Operations 21076-3103 BALTIMORE PCS 01/06/2006
(410) 816- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 818- Baltimore Teleport Communications Group America 21201-3330 BALTIMORE CLEC -
(410) 818- Baltimore New Cingular Wireless Pcs 21201-3330 WIRELESS 03/24/2005
(410) 818- Baltimore New Cingular Wireless Pcs 21201-3330 WIRELESS 03/24/2005
(410) 818- Baltimore New Cingular Wireless Pcs 21201-3330 WIRELESS 03/24/2005
(410) 819- Easton Verizon Maryland 21601-3015 EASTON RBOC -
(410) 821- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 823- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 824- Laurel Bandwidth.Com Clec 20707-6102 CLEC 08/04/2010
(410) 824- Laurel Ymax Communications Corp 20707-6102 CLEC 01/05/2009
(410) 824- Laurel Comcast Phone Of Northern Maryland 20707-6102 CLEC 12/01/2011
(410) 826- Glen Burnie Verizon Maryland 21061-3033 GLEN BURNIE RBOC -
(410) 827- QUEENSTOWN Core Communications 21658 CLEC 03/05/2004
(410) 829- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 829- Cellco Partnership Dba Verizon Wireless WIRELESS 12/06/2004
(410) 830- Towson Cellco Partnership Dba Verizon Wireless 21204-5206 TOWSON WIRELESS 11/02/2004
(410) 830- Towson Cellco Partnership Dba Verizon Wireless 21204-5206 WIRELESS 04/06/2005
(410) 831- Salisbury Halo Wireless Services 21804-3257 SALISBURY UNKNOWN 12/02/2011
(410) 831- Salisbury Teleport Communications Group America 21804-3257 CLEC 06/21/2012
(410) 833- Reisterstown Verizon Maryland 21136-1024 REISTERSTOWN RBOC -
(410) 834- Laurel Infotelecom 20707-4315 UNKNOWN 09/11/2012
(410) 834- Laurel Rnk 20707-4315 CLEC 07/20/2010
(410) 835- WILLARDS Core Communications 21874 CLEC 03/05/2004
(410) 836- Bel Air Verizon Maryland 21014-3643 BEL AIR RBOC -
(410) 838- Bel Air Verizon Maryland 21014-3643 BEL AIR RBOC -
(410) 840- WESTMINSTER Verizon Maryland 21157 WESTMINSTER RBOC -
(410) 840- WESTMINSTER Level 3 Communications 21157 CLEC 12/05/2005
(410) 841- Annapolis Sprint Spectrum 21401-7011 PCS 02/11/2008
(410) 841- Annapolis Sprint Spectrum 21401-7011 PCS 09/26/2006
(410) 842- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 05/12/2005
(410) 842- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 05/12/2005
(410) 844- Baltimore Peerless Network Of Maryland 21202-2103 BALTIMORE UNKNOWN 09/30/2011
(410) 844- Baltimore Cellco Partnership Dba Verizon Wireless 21202-2103 WIRELESS 10/06/2011
(410) 844- Baltimore Peerless Network Of Maryland 21202-2103 BALTIMORE UNKNOWN 10/04/2011
(410) 844- Baltimore Peerless Network Of Maryland 21202-2103 BALTIMORE UNKNOWN 10/04/2011
(410) 844- Baltimore Peerless Network Of Maryland 21202-2103 BALTIMORE UNKNOWN 10/04/2011
(410) 844- Baltimore Peerless Network Of Maryland 21202-2103 BALTIMORE UNKNOWN 10/04/2011
(410) 845- SALISBURY Level 3 Communications 21875 CLEC 10/20/2004
(410) 845- SALISBURY Verizon Maryland 21875 SALISBURY RBOC 01/24/2003
(410) 845- SALISBURY Sprint Spectrum 21875 PCS 02/23/2005
(410) 845- SALISBURY Sprint Spectrum 21875 PCS 03/23/2004
(410) 846- Baltimore Level 3 Communications 21202-4035 CLEC 02/02/2005
(410) 846- Baltimore Bandwidth.Com Clec 21202-4035 CLEC 07/16/2012
(410) 846- Baltimore Level 3 Communications 21202-4035 CLEC 07/29/2003
(410) 846- Baltimore Peerless Network Of Maryland 21202-4035 UNKNOWN 09/17/2012
(410) 846- Baltimore Peerless Network Of Maryland 21202-4035 UNKNOWN 09/17/2012
(410) 848- WESTMINSTER Verizon Maryland 21157 WESTMINSTER RBOC -
(410) 849- Annapolis Level 3 Communications 21401-7011 CLEC 04/14/2008
(410) 849- Annapolis Us Lec Of Maryland 21401-7011 COLUMBIA CLEC 01/15/2004
(410) 849- Annapolis Comcast Phone Of Northern Maryland 21401-7011 CLEC 06/30/2005
(410) 850- BALT WA INTL ARPT Verizon Maryland 21240 FRIENDSHIP RBOC -
(410) 852- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 853- Towson Comcast Phone Of Northern Maryland 21204-5206 CLEC 02/11/2005
(410) 855- BALT WA INTL ARPT Verizon Maryland 21240 FRIENDSHIP RBOC -
(410) 856- Cockeysville Lightwave Communications 21030-1301 CLEC 03/25/2005
(410) 858- Annapolis Verizon Maryland 21401-1910 ANNAPOLIS RBOC 03/11/2005
(410) 858- Annapolis Nextel Communications 21401-1910 WIRELESS 01/06/2006
(410) 858- Annapolis Nextel Communications 21401-1910 WIRELESS 01/23/2006
(410) 858- Annapolis Sprint Spectrum 21401-1910 PCS 08/09/2011
(410) 858- Annapolis New Cingular Wireless Pcs 21401-1910 WIRELESS 05/12/2005
(410) 858- Annapolis Verizon Maryland 21401-1910 ANNAPOLIS RBOC 03/16/2005
(410) 860- SALISBURY Verizon Maryland 21875 SALISBURY RBOC -
(410) 861- Reisterstown Bandwidth.Com Clec 21136-1024 CLEC 11/12/2008
(410) 861- Reisterstown Mci Worldcom Communications 21136-1024 BALTIMORE CLEC 01/16/2007
(410) 861- Reisterstown Atx Telecommunications Services, Ltd 21136-1024 REISTERSTOWN CLEC 04/14/2006
(410) 861- Reisterstown Comcast Phone Of Northern Maryland 21136-1024 CLEC 01/09/2007
(410) 862- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(410) 862- Laurel Teleport Communications Group America 20707-4315 LAUREL CLEC 08/15/2012
(410) 864- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 865- BALT WA INTL ARPT Verizon Maryland 21240 FRIENDSHIP RBOC -
(410) 866- Baltimore Verizon Maryland 21206-5353 FRANKFORD RBOC -
(410) 867- Mci Worldcom Communications BALTIMORE CLEC 02/14/2006
(410) 869- Catonsville Verizon Maryland 21228-4642 CATONSVILLE RBOC -
(410) 869- Catonsville At&T Local 21228-4642 BALTIMORE CLEC 11/06/2002
(410) 870- Comcast Phone Of Northern Maryland CLEC 02/10/2005
(410) 870- Comcast Phone Of Northern Maryland CLEC 05/22/2006
(410) 870- Comcast Phone Of Northern Maryland CLEC 02/25/2009
(410) 870- Bandwidth.Com Clec CLEC 09/15/2011
(410) 870- Bandwidth.Com Clec CLEC 03/30/2012
(410) 870- Bandwidth.Com Clec CLEC 09/14/2012
(410) 871- WESTMINSTER Quantum Telecommunications 21157 WESTMINSTER CLEC 10/20/2003
(410) 871- WESTMINSTER Bandwidth.Com Clec 21157 CLEC 01/26/2010
(410) 873- NANTICOKE Verizon Maryland 21840 NANTICOKE RBOC -
(410) 874- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 874- Baltimore Atx Telecommunications Services, Ltd 21202-4035 CLEC 05/31/2006
(410) 874- Baltimore Peerless Network Of Maryland 21202-4035 UNKNOWN 09/17/2012
(410) 874- Baltimore Comcast Phone Of Northern Maryland 21202-4035 CLEC 09/01/2006
(410) 875- WESTMINSTER Verizon Maryland 21157 WESTMINSTER RBOC -
(410) 876- WESTMINSTER Verizon Maryland 21157 WESTMINSTER RBOC -
(410) 877- Bel Air Cellco Partnership Dba Verizon Wireless 21014-3643 WIRELESS 07/06/2006
(410) 877- Bel Air Level 3 Communications 21014-3643 CLEC 02/06/2006
(410) 878- Baltimore Comcast Phone Of Northern Maryland 21202-4035 CLEC 07/11/2006
(410) 878- Baltimore Paetec Communications 21202-4035 BALTIMORE CLEC 08/15/2005
(410) 878- Baltimore Paetec Communications 21202-4035 BALTIMORE CLEC 08/15/2005
(410) 878- Baltimore Atx Telecommunications Services, Ltd 21202-4035 ROCKVILLE CLEC 07/11/2006
(410) 880- Laurel Verizon Maryland 20707-4315 LAUREL RBOC -
(410) 881- Baltimore Level 3 Communications 21202-4035 CLEC 02/08/2006
(410) 881- Baltimore Bandwidth.Com Clec 21202-4035 CLEC 01/26/2010
(410) 881- Baltimore Bandwidth.Com Clec 21202-4035 CLEC 03/07/2011
(410) 881- Baltimore Cavalier Telephone Mid Atlantic 21202-4035 CLEC 12/30/2010
(410) 883- SHARPTOWN Verizon Maryland 21861 SHARPTOWN RBOC -
(410) 884- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(410) 885- CHESAPEAKE CITY Core Communications 21915 CLEC 03/04/2004
(410) 885- CHESAPEAKE CITY Level 3 Communications 21915 CLEC 10/12/2011
(410) 885- CHESAPEAKE CITY Cavalier Telephone, (Mid Atlantic) 21915 CLEC 09/15/2009
(410) 886- TILGHMAN Core Communications 21671 CLEC 03/05/2004
(410) 887- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 888- Laurel Rnk 20707-4315 CLEC 03/07/2012
(410) 889- Baltimore Verizon Maryland 21218-3910 BALTIMORE RBOC -
(410) 891- Mci Worldcom Communications BALTIMORE CLEC -
(410) 891- Broadwing Communications CLEC 02/06/2003
(410) 892- BALT WA INTL ARPT Verizon Maryland 21240 FRIENDSHIP RBOC -
(410) 894- Usa Mobility Wireless WIRELESS -
(410) 896- Delmar Verizon Maryland 21875-1510 DELMAR RBOC -
(410) 896- Delmar Cellco Partnership Dba Verizon Wireless 21875-1510 WIRELESS 05/04/2012
(410) 896- Delmar Cellco Partnership Dba Verizon Wireless 21875-1510 WIRELESS 05/04/2012
(410) 896- Delmar Ymax Communications Corp 21875-1510 CLEC 03/07/2011
(410) 897- Annapolis Cellco Partnership Dba Verizon Wireless 21401-7011 WIRELESS 06/02/2005
(410) 898- Beltsville Verizon Maryland 20705-1378 MUIRKIRK RBOC -
(410) 900- Baltimore Ctc Communications Corp 21202-2103 BALTIMORE CLEC 10/04/2004
(410) 900- Baltimore Ctc Communications Corp 21202-2103 BALTIMORE CLEC 10/05/2004
(410) 900- Baltimore Omnipoint Communications Cap Operations 21202-2103 BALTIMORE PCS 05/10/2005
(410) 900- Baltimore Omnipoint Communications Cap Operations 21202-2103 BALTIMORE PCS 01/05/2005
(410) 900- Baltimore Omnipoint Communications Cap Operations 21202-2103 BALTIMORE PCS 01/05/2005
(410) 900- Baltimore Omnipoint Communications Cap Operations 21202-2103 BALTIMORE PCS 12/03/2004
(410) 901- Cambridge Sprint Spectrum 21613-1839 PCS 02/07/2005
(410) 903- Hanover Sprint Spectrum 21076-1325 PCS -
(410) 904- Baltimore Vdl, Dba Global Telecom Brokers 21202-4035 CLEC 01/21/2004
(410) 905- Hanover Sprint Spectrum 21076-1325 PCS -
(410) 907- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 908- Hanover Sprint Spectrum 21076-1325 PCS -
(410) 910- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 912- SALISBURY Cavalier Telephone, (Mid Atlantic) 21875 CLEC -
(410) 914- Bel Air Cavalier Telephone, (Mid Atlantic) 21014-3643 CLEC -
(410) 914- Bel Air Comcast Phone Of Northern Maryland 21014-3643 CLEC 02/10/2005
(410) 914- Bel Air Bandwidth.Com Clec 21014-3643 CLEC 01/26/2010
(410) 916- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 918- Essex Verizon Maryland 21221-3801 ESSEX RBOC -
(410) 919- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 02/10/2004
(410) 919- Baltimore Sprint Spectrum 21202-4035 PCS 08/09/2011
(410) 919- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 02/10/2004
(410) 921- Laurel Tw Telecom Of Maryland 20707-6102 LAUREL CLEC -
(410) 921- Laurel Bandwidth.Com Clec 20707-6102 CLEC 08/04/2010
(410) 921- Laurel Bandwidth.Com Clec 20707-6102 CLEC 07/22/2011
(410) 922- Randallstown Verizon Maryland 21133-5205 RANDALLSTOWN RBOC -
(410) 924- Cellco Partnership Dba Verizon Wireless WIRELESS -
(410) 926- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 926- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 02/05/2005
(410) 926- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 03/01/2005
(410) 926- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 03/01/2005
(410) 926- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 03/01/2005
(410) 927- Laurel Tw Telecom Of Maryland 20707-6102 LAUREL CLEC -
(410) 927- Laurel Level 3 Communications 20707-6102 CLEC 08/27/2008
(410) 928- MILLINGTON Verizon Maryland 21651 MILLINGTON RBOC -
(410) 928- MILLINGTON Idt America Corp 21651 CLEC 04/10/2006
(410) 928- MILLINGTON Verizon Maryland 21651 MILLINGTON RBOC 10/07/2004
(410) 928- MILLINGTON Mci Worldcom Communications 21651 EASTON CLEC 12/09/2008
(410) 929- Bandwidth.Com Clec CLEC 05/13/2008
(410) 929- Bandwidth.Com Clec CLEC 11/12/2008
(410) 929- Bandwidth.Com Clec CLEC 11/12/2008
(410) 929- Bandwidth.Com Clec CLEC 11/12/2008
(410) 929- Level 3 Communications CLEC 08/05/2009
(410) 929- Ymax Communications Corp CLEC 09/14/2009
(410) 931- Verizon Maryland PARKVILLE RBOC -
(410) 933- Verizon Maryland PARKVILLE RBOC -
(410) 934- Laurel Bandwidth.Com Clec 20707-4315 CLEC 06/18/2012
(410) 934- Laurel Level 3 Communications 20707-4315 CLEC 11/29/2012
(410) 934- Laurel Bandwidth.Com Clec 20707-4315 CLEC 05/14/2012
(410) 934- Laurel Peerless Network Of Maryland 20707-4315 UNKNOWN 09/17/2012
(410) 934- Laurel New Cingular Wireless Pcs 20707-4315 LAUREL WIRELESS 01/30/2012
(410) 936- Baltimore Verizon Maryland 21217-3803 BALTIMORE RBOC -
(410) 938- Towson Verizon Maryland 21204-5206 TOWSON RBOC -
(410) 940- Baltimore Atx Telecommunications Services, Ltd 21202-2103 CLEC 01/22/2002
(410) 940- Baltimore Nextel Communications 21202-2103 WIRELESS 12/26/2003
(410) 940- Baltimore Nextel Communications 21202-2103 WIRELESS 09/08/2004
(410) 940- Baltimore Nextel Communications 21202-2103 WIRELESS 09/16/2004
(410) 940- Baltimore Nextel Communications 21202-2103 WIRELESS 02/07/2005
(410) 940- Baltimore New Cingular Wireless Pcs 21202-2103 WIRELESS 09/09/2003
(410) 941- JARRETTSVILLE Level 3 Communications 21084 CLEC 05/19/2006
(410) 941- JARRETTSVILLE Level 3 Communications 21084 CLEC 01/16/2004
(410) 941- JARRETTSVILLE Mci Worldcom Communications 21084 BALTIMORE CLEC 12/09/2008
(410) 941- JARRETTSVILLE Bandwidth.Com Clec 21084 CLEC 11/12/2008
(410) 942- Havre De Grace Atx Telecommunications Services, Ltd 21078-3118 CLEC 02/27/2004
(410) 942- Havre De Grace Vdl, Dba Global Telecom Brokers 21078-3118 CLEC 01/21/2004
(410) 942- Havre De Grace Level 3 Communications 21078-3118 CLEC 02/06/2006
(410) 943- HURLOCK Comcast Phone Of Northern Maryland 21643 CLEC 06/20/2006
(410) 944- WOODLAWN Verizon Maryland 21207 WOODLAWN RBOC -
(410) 946- Annapolis Verizon Maryland 21401-7011 WASZ 14 RBOC -
(410) 946- Annapolis Level 3 Communications 21401-7011 CLEC 01/25/2008
(410) 946- Annapolis Sprint Spectrum 21401-7011 PCS 09/28/2011
(410) 946- Annapolis Sprint Spectrum 21401-7011 PCS 08/16/2011
(410) 946- Annapolis Ymax Communications Corp 21401-7011 CLEC 04/01/2008
(410) 948- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 948- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 03/01/2005
(410) 948- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 03/01/2005
(410) 948- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 03/01/2005
(410) 948- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS 03/01/2005
(410) 949- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 949- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 01/08/2003
(410) 949- Baltimore New Cingular Wireless Pcs 21202-4035 WIRELESS 01/08/2003
(410) 949- Baltimore Nextel Communications 21202-4035 ROCKVILLE WIRELESS 09/07/2005
(410) 951- Baltimore Teleport Communications Group America 21201-3330 BALTIMORE CLEC -
(410) 953- Columbia Verizon Maryland 21046-2100 COLUMBIA RBOC -
(410) 954- Baltimore Verizon Maryland 21202-2103 BALTIMORE RBOC -
(410) 956- MAYO Verizon Maryland 21106 WEST RIVER RBOC -
(410) 957- POCOMOKE CITY Cavalier Telephone, (Mid Atlantic) 21851 CLEC 09/09/2009
(410) 959- UNKNOWN -
(410) 961- Hanover Sprint Spectrum 21076-1325 PCS -
(410) 963- Hanover Sprint Spectrum 21076-1325 PCS -
(410) 965- WOODLAWN Verizon Maryland 21207 WOODLAWN RBOC -
(410) 967- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 968- Crisfield Core Communications 21817-1233 CLEC 03/04/2004
(410) 970- Baltimore Mcimetro Access Transmission Services 21202-4035 ROCKVILLE CLEC -
(410) 970- Baltimore Nextel Communications 21202-4035 WIRELESS 01/08/2004
(410) 970- Baltimore Level 3 Communications 21202-4035 CLEC 02/28/2003
(410) 970- Baltimore Level 3 Communications 21202-4035 CLEC 02/02/2005
(410) 970- Baltimore Quantum Telecommunications 21202-4035 CLEC 10/22/2003
(410) 972- Baltimore Teleport Communications Group America 21201-3330 BALTIMORE CLEC -
(410) 972- Baltimore New Cingular Wireless Pcs 21201-3330 COLUMBIA WIRELESS 07/27/2011
(410) 972- Baltimore New Cingular Wireless Pcs 21201-3330 COLUMBIA WIRELESS 07/27/2011
(410) 972- Baltimore New Cingular Wireless Pcs 21201-3330 COLUMBIA WIRELESS 07/27/2011
(410) 973- Mcc Telephony Of The Mid Atlantic UNKNOWN 06/25/2010
(410) 975- Severna Park Verizon Maryland 21146-3921 SEVERNA PARK RBOC -
(410) 975- Severna Park Comcast Phone Of Northern Maryland 21146-3921 CLEC 01/09/2007
(410) 975- Severna Park Bandwidth.Com Clec 21146-3921 CLEC 08/14/2012
(410) 976- Baltimore Washington Telephone Bwt CLEC -
(410) 978- Columbia New Cingular Wireless Pcs 21045-4716 WIRELESS -
(410) 980- Baltimore Cellco Partnership Dba Verizon Wireless 21202-4035 WIRELESS -
(410) 980- Baltimore Cellco Partnership Dba Verizon Wireless 21202-4035 WIRELESS 11/02/2004
(410) 980- Baltimore Cellco Partnership Dba Verizon Wireless 21202-4035 WIRELESS 01/05/2005
(410) 980- Baltimore Cellco Partnership Dba Verizon Wireless 21202-4035 WIRELESS 01/05/2005
(410) 980- Baltimore Cellco Partnership Dba Verizon Wireless 21202-4035 WIRELESS 12/06/2004
(410) 981- BALT WA INTL ARPT Verizon Maryland 21240 FRIENDSHIP RBOC -
(410) 982- Baltimore Quantum Telecommunications 21202-3507 CLEC 10/13/2003
(410) 982- Baltimore Nextel Communications 21202-3507 WIRELESS 11/10/2003
(410) 982- Baltimore Nextel Communications 21202-3507 WIRELESS 11/10/2003
(410) 982- Baltimore Nextel Communications 21202-3507 WIRELESS 12/17/2003
(410) 982- Baltimore New Cingular Wireless Pcs 21202-3507 WIRELESS 12/01/2003
(410) 982- Baltimore New Cingular Wireless Pcs 21202-3507 WIRELESS 12/01/2003
(410) 983- CARDIFF New Cingular Wireless Pcs 21024 CARDIFF WIRELESS 10/08/2004
(410) 985- Laurel Baltimore Washington Telephone Bwt 20707-4320 CLEC -
(410) 987- DORRS CORNER Verizon Maryland 21108 SEVERN RBOC -
(410) 988- Clarksville Ymax Communications Corp 21029-1228 CLEC 06/26/2008
(410) 988- Clarksville Level 3 Communications 21029-1228 CLEC 08/15/2005
(410) 988- Clarksville Level 3 Communications 21029-1228 CLEC 08/15/2005
(410) 988- Clarksville Bandwidth.Com Clec 21029-1228 CLEC 08/04/2010
(410) 989- CHURCHVILLE Verizon Maryland 21028 CHURCHVILLE RBOC -
(410) 989- CHURCHVILLE Bandwidth.Com Clec 21028 CLEC 07/19/2011
(410) 990- Annapolis Verizon Maryland 21401-1910 ANNAPOLIS RBOC -
(410) 992- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(410) 993- BALT WA INTL ARPT Verizon Maryland 21240 FRIENDSHIP RBOC -
(410) 994- ABERDEEN Bandwidth.Com Clec 21001 CLEC 05/17/2011
(410) 994- ABERDEEN Ctc Communications Corp 21001 BALTIMORE CLEC 03/09/2005
(410) 994- ABERDEEN Bandwidth.Com Clec 21001 CLEC 06/07/2011
(410) 995- Columbia Verizon Maryland 21044-1741 COLUMBIA 1 RBOC -
(410) 996- Elkton Bandwidth.Com Clec 21921-5537 CLEC 09/28/2010
(410) 998- Owings Mills Verizon Maryland 21117-3849 OWINGS MILLS RBOC -
(410) 999- Laurel Bandwidth.Com Clec 20707-4320 CLEC 11/02/2010
(410) 999- Laurel Baltimore Washington Telephone Bwt 20707-4320 CLEC 10/21/2010
(410) 999- Laurel Cellco Partnership Dba Verizon Wireless 20707-4320 WIRELESS 09/29/2011
(410) 999- Laurel Baltimore Washington Telephone Bwt 20707-4320 CLEC 06/16/2003
(410) 999- Laurel Bandwidth.Com Clec 20707-4320 CLEC 05/04/2012


Cities that Use 410 Area Code

Easton, Baltimore, Ellicott City, Pikesville, Columbia, Windsor Mill, Ocean Pines, Salisbury, Hanover, Ocean City, Annapolis, Cambridge, Glen Burnie, Oxford, Cockeysville, Essex, Hampstead, Perry Hall, Towson, Armiger, North Beach, Laurel, Woodlawn, Aberdeen, Cecilton, Dundalk, North East, Odenton, Severna Park, Chase, Parkton, Owings Mills, Westminster, Still Pond, Saint Margarets, Brooklyn, Bishop, Hillsboro, Vienna, Bainbridge, Elkridge, Sparrows Point, Elkton, Honga, Cardiff, Prince Frederick, Edgewood, Bel Air, Smith Island, Reisterstown, Sudlersville, Glenwood, Crofton, Catonsville, Darlington, Manor, Trappe, Denton, Greensboro, Mutual, Randallstown, Dorrs Corner, Clarksville, Sykesville, Chestertown, Jarrettsville, Fork, Beltsville, Marion, Snow Hill, New Windsor, Rock Hall, Berlin, Romancoke, Galena, Rising Sun, Parkville, Preston, Balt Wa Intl Arpt, Wye Mills, Churchville, Upper Marlboro, Saint Michaels, Federalsburg, Taneytown, Union Bridge, Deal Island, Mayo, Queenstown, Willards, Nanticoke, Sharptown, Chesapeake City, Tilghman, Delmar, Millington, Havre De Grace, Hurlock, Pocomoke City, and Crisfield

410 Area Code External Links