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Area Code 312 Map, Cities and Telecommunication Exchanges

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Area code 312 is located in Illinois. The following table lists the area code exchanges and switches:

312 Area Code Exchanges & Switches:

Prefix Main City Company Zip Code Switch Name Prefix Type Introduced
(312) 201- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 202- CHICAGO Cellco Partnership Dba Verizon Wireless 60611 WIRELESS 12/16/2010
(312) 203- New Cingular Wireless Pcs WIRELESS -
(312) 204- CHICAGO Xo Illinois 60611 CLEC 10/02/2008
(312) 204- CHICAGO Xo Illinois 60611 CLEC 10/02/2008
(312) 205- Chicago Allegiance Telecom 60603-5202 CHICAGO ZONE CLEC -
(312) 207- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 209- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 211- UNKNOWN -
(312) 212- CHICAGO Level 3 Communications 60605 CLEC 03/08/2006
(312) 212- CHICAGO Xo Illinois 60605 CHICAGO CLEC 07/06/2005
(312) 212- CHICAGO Xo Illinois 60605 CHICAGO CLEC 07/06/2005
(312) 212- CHICAGO Sigecom 60605 CLEC 07/05/2007
(312) 214- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 216- Globalcom CLEC 02/13/2012
(312) 216- Globalcom CLEC 02/16/2012
(312) 216- Ovation Communications Of Illinois CLEC 03/30/2012
(312) 216- Ovation Communications Of Illinois CLEC 03/30/2012
(312) 216- T Mobile Usa CHICAGO PCS 11/15/2012
(312) 216- New Cingular Wireless Pcs WIRELESS 10/23/2012
(312) 218- New Cingular Wireless Pcs WIRELESS -
(312) 219- New Cingular Wireless Pcs WIRELESS 10/23/2012
(312) 219- Bandwidth.Com Clec CLEC 05/25/2012
(312) 219- Bandwidth.Com Clec CLEC 05/25/2012
(312) 219- Teleport Communications Group CLEC 07/03/2012
(312) 219- Level 3 Communications CLEC 07/10/2012
(312) 221- Bridgeview Sprint Spectrum 60455-1558 PCS 06/17/2011
(312) 221- Bridgeview Sprint Spectrum 60455-1558 PCS 06/20/2011
(312) 221- Bridgeview Sprint Spectrum 60455-1558 PCS 06/20/2011
(312) 221- Bridgeview Sprint Spectrum 60455-1558 PCS 06/20/2011
(312) 221- Bridgeview Sprint Spectrum 60455-1558 PCS 06/20/2011
(312) 221- Bridgeview Sprint Spectrum 60455-1558 PCS 06/20/2011
(312) 223- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 225- CHICAGO Ameritech Illinois 60611 CHCG CALUMET DS1 RBOC -
(312) 227- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC 09/15/2010
(312) 227- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC 09/20/2010
(312) 227- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC 09/20/2010
(312) 227- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC 09/20/2010
(312) 227- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC 09/20/2010
(312) 227- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC 09/20/2010
(312) 229- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS0 RBOC -
(312) 229- CHICAGO Ovation Communications Of Illinois 60611 CHICAGO CLEC 01/05/2000
(312) 229- CHICAGO Ovation Communications Of Illinois 60611 CHICAGO CLEC 01/05/2000
(312) 229- CHICAGO Ovation Communications Of Illinois 60611 CHICAGO CLEC 01/05/2000
(312) 230- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 232- BURR RIDGE American Messaging (Am) 61257 WIRELESS 04/23/2001
(312) 233- CHICAGO Level 3 Communications 60611 CLEC 11/10/2005
(312) 234- CHICAGO Level 3 Communications 60611 CLEC 03/03/2008
(312) 235- CHICAGO Level 3 Communications 60605 CLEC 04/01/2008
(312) 235- CHICAGO Paetec Communications 60605 CHICAGO CLEC 10/21/2005
(312) 235- CHICAGO Globalcom 60605 CLEC 10/28/2005
(312) 235- CHICAGO Cellco Partnership Dba Verizon Wireless 60605 WIRELESS 07/20/2010
(312) 237- Hickory Hills Cellco Partnership Dba Verizon Wireless 60457-1075 WIRELESS -
(312) 237- Hickory Hills Paetec Communications 60457-1075 CLEC 06/20/2008
(312) 238- Arlington Heights Broadwing Communications 60005-4713 ELK GROVE CLEC -
(312) 239- Chicago Level 3 Communications 60606-3704 CLEC 10/13/2004
(312) 239- Chicago Globalcom 60606-3704 CLEC 02/17/2004
(312) 239- Chicago Level 3 Communications 60606-3704 CLEC 09/26/2006
(312) 239- Chicago Level 3 Communications 60606-3704 CLEC 09/26/2006
(312) 241- New Cingular Wireless Pcs WIRELESS 08/17/2011
(312) 241- Level 3 Communications CLEC 09/30/2011
(312) 241- New Cingular Wireless Pcs WIRELESS 08/18/2011
(312) 241- New Cingular Wireless Pcs WIRELESS 08/18/2011
(312) 241- New Cingular Wireless Pcs WIRELESS 08/18/2011
(312) 241- New Cingular Wireless Pcs WIRELESS 08/18/2011
(312) 242- Chicago Broadwing Communications 60605-1516 CLEC 09/29/2000
(312) 242- Chicago Broadwing Communications 60605-1516 CLEC 03/28/2002
(312) 242- Chicago Broadwing Communications 60605-1516 CLEC 01/03/2001
(312) 242- Chicago Broadwing Communications 60605-1516 CLEC 11/15/2000
(312) 242- Chicago Globalcom 60605-1516 CLEC 06/12/2001
(312) 244- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 244- CHICAGO Xo Illinois 60606 CHICAGO CLEC 11/15/2005
(312) 244- CHICAGO Cellco Partnership Dba Verizon Wireless 60606 WIRELESS 07/20/2010
(312) 246- New Cingular Wireless Pcs WIRELESS -
(312) 247- Chicago Globalcom 60607-4568 CLEC 04/07/2004
(312) 247- Chicago Globalcom 60607-4568 CLEC 04/07/2004
(312) 247- Chicago Globalcom 60607-4568 CLEC 04/07/2004
(312) 247- Chicago Globalcom 60607-4568 CLEC 04/07/2004
(312) 247- Chicago Globalcom 60607-4568 CLEC 04/07/2004
(312) 249- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 251- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 252- Chicago Ameritech Illinois 60603-5202 CHCG FRANKLIN DS3 RBOC 10/01/2002
(312) 253- Chicago Allegiance Telecom 60603-5202 CHICAGO ZONE CLEC -
(312) 253- Chicago Teleport Communications Group 60603-5202 CHICAGO CLEC 05/11/2010
(312) 254- Chicago Allegiance Telecom 60603-5202 CHICAGO ZONE CLEC -
(312) 254- Chicago Cellco Partnership Dba Verizon Wireless 60603-5202 WIRELESS 07/20/2010
(312) 255- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 256- Chicago Cellco Partnership Dba Verizon Wireless 60603-5202 WIRELESS 07/20/2010
(312) 256- Chicago Denali Spectrum License 60603-5202 PCS 02/17/2010
(312) 256- Chicago Denali Spectrum License 60603-5202 PCS 02/17/2010
(312) 256- Chicago Cimco Communications 60603-5202 CLEC 01/02/2009
(312) 257- Cellco Partnership Dba Verizon Wireless WIRELESS 08/22/2011
(312) 257- Level 3 Communications CLEC 09/15/2011
(312) 257- Cellco Partnership Dba Verizon Wireless WIRELESS 05/14/2012
(312) 257- Cellco Partnership Dba Verizon Wireless WIRELESS 05/16/2012
(312) 257- New Cingular Wireless Pcs WIRELESS 05/10/2012
(312) 258- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS0 RBOC -
(312) 260- Bensenville Mcimetro Access Transmission Services 60106-1634 CHICAGO CLEC -
(312) 261- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC -
(312) 262- Chicago Allegiance Telecom 60603-5202 CHICAGO ZONE CLEC -
(312) 262- Chicago Cbeyond Communications 60603-5202 CLEC 02/20/2009
(312) 262- Chicago Cbeyond Communications 60603-5202 CLEC 02/20/2009
(312) 262- Chicago Cbeyond Communications 60603-5202 CLEC 08/16/2010
(312) 263- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 265- Access One CLEC 11/29/2005
(312) 265- Comcast Phone Of Illinois, Dba Comco CLEC 07/14/2006
(312) 265- Level 3 Communications CLEC 11/13/2006
(312) 265- Broadwing Communications CLEC 04/25/2006
(312) 265- Broadwing Communications CLEC 04/25/2006
(312) 265- Access One CLEC 12/01/2005
(312) 267- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 267- CHICAGO Level 3 Communications 60606 CLEC 07/16/2010
(312) 267- CHICAGO Globalcom 60606 CLEC 08/31/2004
(312) 267- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC 05/14/2002
(312) 267- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC 05/14/2002
(312) 268- Arlington Heights Broadwing Communications 60005-4713 ELK GROVE CLEC -
(312) 269- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 272- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 273- Cellco Partnership Dba Verizon Wireless WIRELESS 09/14/2011
(312) 273- New Cingular Wireless Pcs WIRELESS 05/24/2012
(312) 273- Cellco Partnership Dba Verizon Wireless WIRELESS 05/16/2012
(312) 273- Level 3 Communications CLEC 09/30/2011
(312) 273- T Mobile Usa CHICAGO PCS 10/10/2011
(312) 274- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC -
(312) 276- Chicago Allegiance Telecom 60603-5202 CHICAGO ZONE CLEC -
(312) 278- Arlington Heights Broadwing Communications 60005-4713 ELK GROVE CLEC -
(312) 278- Arlington Heights Ameritech Illinois 60005-4713 CHCG SUPERIOR DS2 RBOC 08/02/2000
(312) 278- Arlington Heights Ameritech Illinois 60005-4713 CHCG SUPERIOR DS2 RBOC 08/02/2000
(312) 280- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 281- Chicago Ameritech Illinois 60606-1784 CHCG FRANKLIN DS4 RBOC 06/27/2000
(312) 283- Chicago Global Crossing Local Services 60606-1784 CHICAGO CLEC -
(312) 284- Chicago Xo Illinois 60601-5212 CHICGOZN01 CLEC -
(312) 285- Bridgeview Level 3 Communications 60455-1558 CLEC 11/13/2006
(312) 285- Bridgeview Sbc Internet Services 60455-1558 CLEC 04/25/2005
(312) 287- Buffalo Grove Nextel Communications 60089-4557 WIRELESS -
(312) 288- Bensenville Cellco Partnership Dba Verizon Wireless 60106-1634 WIRELESS 06/10/2010
(312) 288- Bensenville Cellco Partnership Dba Verizon Wireless 60106-1634 WIRELESS 06/10/2010
(312) 288- Bensenville Cellco Partnership Dba Verizon Wireless 60106-1634 WIRELESS 06/10/2010
(312) 290- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 291- CHICAGO Bandwidth.Com Clec 60605 CLEC 05/19/2011
(312) 291- CHICAGO Xo Illinois 60605 CHICGOZN01 CLEC 11/15/2005
(312) 291- CHICAGO Teleport Communications Group 60605 CHICAGO CLEC 01/10/2006
(312) 291- CHICAGO Globalcom 60605 CLEC 04/28/2006
(312) 291- CHICAGO Comcast Phone Of Illinois, Dba Comco 60605 CLEC 05/27/2010
(312) 292- Cellco Partnership Dba Verizon Wireless WIRELESS 06/18/2012
(312) 292- Ameritech Illinois CHCG WABASH DS2 RBOC 11/01/2011
(312) 292- Ameritech Illinois CHCG WABASH DS2 RBOC 11/01/2011
(312) 292- T Mobile Usa CHICAGO PCS 10/10/2011
(312) 292- T Mobile Usa CHICAGO PCS 10/10/2011
(312) 293- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS2 RBOC -
(312) 295- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 297- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC -
(312) 298- Paetec Communications CHICAGO CLEC 01/16/2009
(312) 298- Ameritech Illinois CHCG FRANKLIN DS3 RBOC 05/24/2001
(312) 298- Ameritech Illinois CHCG FRANKLIN DS3 RBOC 05/24/2001
(312) 298- Ameritech Illinois CHCG FRANKLIN DS3 RBOC 05/24/2001
(312) 298- Bandwidth.Com Clec CLEC 01/26/2010
(312) 300- Net Talk.Com UNKNOWN 04/25/2011
(312) 300- Neutral Tandem Illinois CLEC 12/29/2011
(312) 300- Cbeyond Communications CLEC 01/05/2012
(312) 300- Level 3 Communications CLEC 02/01/2012
(312) 300- Level 3 Communications CLEC 02/01/2012
(312) 300- Neutral Tandem Illinois CLEC 12/29/2011
(312) 302- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC -
(312) 304- New Cingular Wireless Pcs WIRELESS -
(312) 306- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC -
(312) 308- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 310- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 312- UNKNOWN -
(312) 315- New Cingular Wireless Pcs WIRELESS -
(312) 317- New Cingular Wireless Pcs WIRELESS -
(312) 320- New Cingular Wireless Pcs WIRELESS -
(312) 322- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 324- Level 3 Communications CLEC 05/03/2001
(312) 324- Ameritech Illinois CHCG FRANKLIN DS3 RBOC 05/14/2002
(312) 324- Level 3 Communications CLEC 12/29/2004
(312) 324- Broadwing Communications CLEC 04/26/2002
(312) 324- Broadwing Communications CLEC 04/26/2002
(312) 324- Ameritech Illinois CHCG FRANKLIN DS3 RBOC 05/14/2002
(312) 325- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC 06/24/2003
(312) 325- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC 06/24/2003
(312) 325- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC 06/24/2003
(312) 325- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC 06/24/2003
(312) 325- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC 06/24/2003
(312) 326- CHICAGO Ameritech Illinois 60611 CHCG CALUMET DS0 RBOC -
(312) 328- CHICAGO Ameritech Illinois 60611 CHCG CALUMET DS0 RBOC -
(312) 330- New Cingular Wireless Pcs WIRELESS -
(312) 332- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 334- Chicago Globalcom 60607-4568 CLEC -
(312) 336- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS6 RBOC -
(312) 338- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 340- Cellco Partnership Dba Verizon Wireless WIRELESS 09/21/2011
(312) 340- T Mobile Usa CHICAGO PCS 10/10/2011
(312) 340- Teleport Communications Group CHICAGO CLEC 11/11/2011
(312) 340- Us Xchange Of Illinois Dba Choice One Comm CLEC 11/03/2011
(312) 340- New Cingular Wireless Pcs WIRELESS 11/18/2011
(312) 340- New Cingular Wireless Pcs WIRELESS 11/18/2011
(312) 342- New Cingular Wireless Pcs WIRELESS -
(312) 344- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 344- CHICAGO Comcast Phone Of Illinois, Dba Comco 60605 CLEC 05/06/2011
(312) 344- CHICAGO Bandwidth.Com Clec 60605 CLEC 07/18/2011
(312) 346- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 348- Chicago Neutral Tandem Illinois 60607-4568 CHICAGO CLEC 11/14/2003
(312) 348- Chicago Access One 60607-4568 CLEC 01/22/2009
(312) 348- Chicago Mci Worldcom Communications 60607-4568 ELK GROVE CLEC 06/05/2008
(312) 348- Chicago Mci Worldcom Communications 60607-4568 ELK GROVE CLEC 06/05/2008
(312) 348- Chicago Mci Worldcom Communications 60607-4568 ELK GROVE CLEC 06/05/2008
(312) 348- Chicago Nextel Communications 60607-4568 WIRELESS 05/12/2009
(312) 350- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 351- Teleport Communications Group CHICAGO CLEC 03/12/2010
(312) 351- Teleport Communications Group CHICAGO CLEC 03/12/2010
(312) 352- BURR RIDGE New Cingular Wireless Pcs 61257 WIRELESS -
(312) 354- Schaumburg New Cingular Wireless Pcs 60173-4529 WIRELESS -
(312) 356- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 359- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 361- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC -
(312) 361- CHICAGO Level 3 Communications 60611 CLEC 07/01/2010
(312) 361- CHICAGO New Cingular Wireless Pcs 60611 WIRELESS 05/25/2011
(312) 361- CHICAGO New Cingular Wireless Pcs 60611 WIRELESS 05/25/2011
(312) 361- CHICAGO Xo Illinois 60611 CLEC 10/15/2010
(312) 363- Chicago Rcn Telecom Services Of Illinois 60654-1501 CLEC -
(312) 363- Chicago T Mobile Usa 60654-1501 CHICAGO PCS 06/08/2004
(312) 363- Chicago T Mobile Usa 60654-1501 CHICAGO PCS 06/08/2004
(312) 365- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 367- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 369- New Cingular Wireless Pcs WIRELESS -
(312) 369- Ameritech Illinois CHCG WABASH DS3 RBOC 04/08/2008
(312) 369- Ameritech Illinois CHCG WABASH DS3 RBOC 04/08/2008
(312) 369- Ameritech Illinois CHCG WABASH DS3 RBOC 04/08/2008
(312) 369- Ameritech Illinois CHCG WABASH DS3 RBOC 04/08/2008
(312) 370- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 372- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 373- Chicago Bandwidth.Com Clec 60601-1014 CLEC 02/02/2010
(312) 374- CHICAGO Comcast Phone Of Illinois, Dba Comco 60611 CLEC 12/17/2012
(312) 374- CHICAGO Comcast Phone Of Illinois, Dba Comco 60611 CLEC 12/17/2012
(312) 376- Chicago Cbeyond Communications 60605-1505 CLEC 06/11/2004
(312) 376- Chicago Cbeyond Communications 60605-1505 CLEC 06/11/2004
(312) 376- Chicago Cbeyond Communications 60605-1505 CLEC 06/11/2004
(312) 376- Chicago United States Cellular Corp 60605-1505 WIRELESS 08/22/2004
(312) 376- Chicago United States Cellular Corp 60605-1505 WIRELESS 08/22/2004
(312) 376- Chicago United States Cellular Corp 60605-1505 WIRELESS 08/22/2004
(312) 378- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 379- Chicago Ameritech Illinois 60605-1029 CHCG ILL DEAR DS2 RBOC 05/14/2002
(312) 379- Chicago Ameritech Illinois 60605-1029 CHCG ILL DEAR DS0 RBOC 03/05/2000
(312) 379- Chicago Ameritech Illinois 60605-1029 CHCG ILL DEAR DS0 RBOC 03/05/2000
(312) 379- Chicago Bandwidth.Com Clec 60605-1029 CLEC 01/26/2010
(312) 380- CHICAGO Bandwidth.Com Clec 60611 CLEC 07/14/2010
(312) 380- CHICAGO Broadwing Communications 60611 CLEC 06/19/2006
(312) 380- CHICAGO Level 3 Communications 60611 CLEC 11/13/2006
(312) 381- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 384- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 384- CHICAGO New Cingular Wireless Pcs 60606 WIRELESS 05/25/2011
(312) 385- CHICAGO New Cingular Wireless Pcs 60605 WIRELESS 05/25/2011
(312) 386- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS2 RBOC -
(312) 386- CHICAGO Level 3 Communications 60605 CLEC 07/13/2011
(312) 386- CHICAGO Level 3 Communications 60605 CLEC 09/14/2007
(312) 387- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 389- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 391- New Cingular Wireless Pcs WIRELESS -
(312) 393- BURR RIDGE American Messaging (Am) 61257 WIRELESS 04/23/2001
(312) 394- CHICAGO T Mobile Usa 60606 CHICAGO PCS 06/16/2011
(312) 395- Chicago At&T Local 60606-3704 CHICAGO CLEC -
(312) 395- Chicago Ameritech Illinois 60606-3704 CHCG FRANKLIN DS0 RBOC 05/06/2003
(312) 395- Chicago Ameritech Illinois 60606-3704 CHCG FRANKLIN DS0 RBOC 12/23/2002
(312) 395- Chicago Broadwing Communications 60606-3704 CLEC 12/19/2002
(312) 395- Chicago Broadwing Communications 60606-3704 CLEC 10/02/2002
(312) 396- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS0 RBOC -
(312) 398- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 400- American Messaging (Am) WIRELESS 04/13/2001
(312) 402- New Cingular Wireless Pcs WIRELESS -
(312) 403- Hickory Hills Cellco Partnership Dba Verizon Wireless 60457-1075 WIRELESS -
(312) 405- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 407- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 409- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 411- UNKNOWN -
(312) 413- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC -
(312) 416- Elk Grove Village Mci Worldcom Communications 60007-5216 ELK GROVE CLEC -
(312) 418- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 420- New Cingular Wireless Pcs WIRELESS -
(312) 422- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 424- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 426- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 428- Level 3 Communications CLEC -
(312) 428- Denali Spectrum License PCS 10/07/2008
(312) 428- Xo Illinois CLEC 01/15/2010
(312) 428- Ymax Communications Corp CLEC 08/11/2009
(312) 428- Ymax Communications Corp CLEC 08/11/2009
(312) 428- Ymax Communications Corp CLEC 08/11/2009
(312) 429- Chicago Ameritech Illinois 60606-1784 CHCG FRANKLIN DS3 RBOC 05/14/2002
(312) 431- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 433- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS0 RBOC -
(312) 434- Bridgeview Sprint Spectrum 60455-1558 PCS 07/08/2011
(312) 434- Bridgeview Sprint Spectrum 60455-1558 PCS 07/12/2011
(312) 434- Bridgeview Sprint Spectrum 60455-1558 PCS 07/12/2011
(312) 434- Bridgeview Sprint Spectrum 60455-1558 PCS 07/12/2011
(312) 434- Bridgeview Sprint Spectrum 60455-1558 PCS 07/12/2011
(312) 434- Bridgeview Sprint Spectrum 60455-1558 PCS 07/12/2011
(312) 436- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 436- CHICAGO Level 3 Communications 60611 CLEC 11/13/2006
(312) 437- Lombard United States Cellular Corp 60148-5403 WIRELESS -
(312) 441- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS0 RBOC -
(312) 442- CHICAGO Bandwidth.Com Clec 60606 CLEC 11/01/2010
(312) 443- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 444- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 445- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC -
(312) 445- CHICAGO Xo Illinois 60611 CHICAGO CLEC 02/21/2008
(312) 445- CHICAGO Access One 60611 CLEC 03/11/2008
(312) 445- CHICAGO Broadwing Communications 60611 CLEC 05/01/2008
(312) 445- CHICAGO Level 3 Communications 60611 CLEC 05/02/2008
(312) 446- Buffalo Grove Nextel Communications 60089-4557 WIRELESS -
(312) 447- CHICAGO Cellco Partnership Dba Verizon Wireless 60605 WIRELESS 12/16/2010
(312) 447- CHICAGO Cimco Communications 60605 CLEC 06/28/2006
(312) 447- CHICAGO Cimco Communications 60605 CLEC 06/28/2006
(312) 447- CHICAGO Cimco Communications 60605 CLEC 03/18/2008
(312) 448- Cellco Partnership Dba Verizon Wireless WIRELESS 08/02/2011
(312) 448- Cellco Partnership Dba Verizon Wireless WIRELESS 08/04/2011
(312) 448- Cellco Partnership Dba Verizon Wireless WIRELESS 04/24/2012
(312) 448- Globalcom CLEC 04/03/2012
(312) 448- Bandwidth.Com Clec CLEC 12/14/2011
(312) 448- Level 3 Communications CLEC 09/26/2011
(312) 450- New Cingular Wireless Pcs WIRELESS -
(312) 450- Denali Spectrum License PCS 10/07/2008
(312) 450- Ymax Communications Corp CLEC 08/11/2009
(312) 450- Ymax Communications Corp CLEC 08/11/2009
(312) 450- Denali Spectrum License PCS 10/07/2008
(312) 451- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 10/22/2003
(312) 451- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 07/15/2003
(312) 451- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 07/15/2003
(312) 451- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 07/30/2003
(312) 451- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 08/12/2003
(312) 452- American Messaging (Am) WIRELESS 04/13/2001
(312) 454- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 456- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 458- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 459- T Mobile Usa PCS 08/04/2011
(312) 459- T Mobile Usa PCS 08/04/2011
(312) 459- Cellco Partnership Dba Verizon Wireless WIRELESS 09/09/2011
(312) 459- Cellco Partnership Dba Verizon Wireless WIRELESS 04/24/2012
(312) 459- T Mobile Usa PCS 09/29/2011
(312) 460- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 460- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC 09/19/2005
(312) 460- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC 09/19/2005
(312) 462- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 462- CHICAGO Level 3 Communications 60606 CLEC 10/27/2010
(312) 462- CHICAGO Level 3 Communications 60606 CLEC 10/08/2010
(312) 463- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS0 RBOC -
(312) 464- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS0 RBOC -
(312) 465- Cellco Partnership Dba Verizon Wireless WIRELESS 08/30/2011
(312) 465- Comcast Phone Of Illinois, Dba Comco CLEC 08/18/2011
(312) 465- Cbeyond Communications CLEC 08/26/2011
(312) 465- Cellco Partnership Dba Verizon Wireless WIRELESS 08/30/2011
(312) 465- New Cingular Wireless Pcs WIRELESS 05/10/2012
(312) 466- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 469- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 469- CHICAGO At&T Local 60611 CHICAGO CLEC 07/30/2001
(312) 469- CHICAGO At&T Local 60611 CHICAGO CLEC 07/30/2001
(312) 469- CHICAGO Broadwing Communications 60611 CLEC 06/04/2002
(312) 470- Bensenville Mcimetro Access Transmission Services 60106-1634 CHICAGO CLEC -
(312) 472- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC 10/27/2005
(312) 472- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC 11/03/2005
(312) 472- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC 11/03/2005
(312) 472- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC 11/03/2005
(312) 472- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC 11/03/2005
(312) 472- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC 11/03/2005
(312) 473- Ymax Communications Corp CLEC 11/21/2006
(312) 473- Ymax Communications Corp CLEC 11/21/2006
(312) 473- Ymax Communications Corp CLEC 11/21/2006
(312) 473- Ymax Communications Corp CLEC 11/21/2006
(312) 473- Ymax Communications Corp CLEC 11/21/2006
(312) 474- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS0 RBOC -
(312) 476- Lombard United States Cellular Corp 60148-5403 WIRELESS -
(312) 476- Lombard Broadwing Communications 60148-5403 CLEC 08/15/2000
(312) 476- Lombard Broadwing Communications 60148-5403 CLEC 04/05/2002
(312) 476- Lombard Ameritech Illinois 60148-5403 CHCG FRANKLIN DS4 RBOC 05/14/2002
(312) 476- Lombard Ameritech Illinois 60148-5403 CHCG FRANKLIN DS4 RBOC 05/14/2002
(312) 476- Lombard Bandwidth.Com Clec 60148-5403 CLEC 02/02/2010
(312) 477- Level 3 Communications CLEC 04/01/2011
(312) 477- Cbeyond Communications CLEC 01/31/2011
(312) 477- At&T Local CHICAGO CLEC 01/14/2011
(312) 477- Denali Spectrum License PCS 02/02/2011
(312) 477- Access One CLEC 02/02/2011
(312) 478- Cibolo Creek Ventures, Dba Routepoint Comm UNKNOWN 10/06/2011
(312) 479- Chicago At&T Local 60606-3704 CHICAGO CLEC -
(312) 479- Chicago T Mobile Usa 60606-3704 CHICAGO PCS 08/12/2003
(312) 479- Chicago T Mobile Usa 60606-3704 CHICAGO PCS 08/12/2003
(312) 479- Chicago T Mobile Usa 60606-3704 CHICAGO PCS 09/05/2003
(312) 479- Chicago T Mobile Usa 60606-3704 CHICAGO PCS 08/18/2004
(312) 480- New Cingular Wireless Pcs WIRELESS -
(312) 480- Xo Illinois CLEC 10/15/2010
(312) 482- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 485- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 486- Elk Grove Village Mci Worldcom Communications 60007-5216 ELK GROVE CLEC 04/26/2004
(312) 486- Elk Grove Village Mci Worldcom Communications 60007-5216 ELK GROVE CLEC 04/26/2004
(312) 486- Elk Grove Village Mci Worldcom Communications 60007-5216 ELK GROVE CLEC 04/26/2004
(312) 486- Elk Grove Village Mci Worldcom Communications 60007-5216 ELK GROVE CLEC 04/26/2004
(312) 486- Elk Grove Village Mci Worldcom Communications 60007-5216 ELK GROVE CLEC 04/26/2004
(312) 488- Pg Telecom Of Illinois CLEC 01/18/2006
(312) 488- Level 3 Communications CLEC 10/10/2006
(312) 488- Xo Illinois CLEC 10/01/2009
(312) 488- Xo Illinois CLEC 01/15/2010
(312) 488- Xo Illinois CLEC 01/15/2010
(312) 488- Bandwidth.Com Clec CLEC 02/02/2010
(312) 489- Xo Illinois CLEC 01/15/2010
(312) 489- Nextel Communications WIRELESS 05/12/2009
(312) 490- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 492- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC -
(312) 493- Chicago T Mobile Usa 60631-3222 CHICAGO PCS -
(312) 495- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 496- CHICAGO Comcast Phone Of Illinois, Dba Comco 60611 CLEC 12/17/2010
(312) 496- CHICAGO Paetec Communications 60611 CHICAGO CLEC 03/01/2007
(312) 498- Bridgeview Sprint Spectrum 60455-1558 PCS -
(312) 500- UNKNOWN -
(312) 502- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 504- New Cingular Wireless Pcs WIRELESS -
(312) 506- Cimco Communications CHICAGO CLEC 05/24/2004
(312) 506- Cimco Communications CHICAGO CLEC 05/24/2004
(312) 506- Cimco Communications CHICAGO CLEC 05/24/2004
(312) 506- Paetec Communications CHICAGO CLEC 04/24/2006
(312) 506- Nextel Communications WIRELESS 12/16/2004
(312) 506- Cimco Communications CHICAGO CLEC 05/24/2004
(312) 507- CHICAGO Cellco Partnership Dba Verizon Wireless 60606 WIRELESS 01/10/2011
(312) 508- Peerless Network Of Illinois CLEC 03/19/2012
(312) 508- New Cingular Wireless Pcs WIRELESS 05/24/2012
(312) 508- Peerless Network Of Illinois CLEC 03/22/2012
(312) 508- Level 3 Communications CLEC 05/24/2012
(312) 508- Clear Rate Communications CLEC 05/17/2012
(312) 508- New Cingular Wireless Pcs WIRELESS 05/24/2012
(312) 509- New Cingular Wireless Pcs WIRELESS 04/05/2012
(312) 509- New Cingular Wireless Pcs WIRELESS 04/05/2012
(312) 509- Peerless Network Of Illinois CLEC 03/09/2012
(312) 509- Neutral Tandem Illinois CLEC 05/04/2012
(312) 509- Neutral Tandem Illinois CLEC 05/04/2012
(312) 510- BURR RIDGE New Cingular Wireless Pcs 61257 WIRELESS -
(312) 512- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 514- American Messaging (Am) WIRELESS 04/13/2001
(312) 516- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 519- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 521- Chicago At&T Local 60606-3704 CHICAGO CLEC -
(312) 521- Chicago Broadwing Communications 60606-3704 CLEC 10/21/2002
(312) 521- Chicago United States Cellular Corp 60606-3704 WIRELESS 02/09/2004
(312) 521- Chicago Access One 60606-3704 CLEC 01/22/2009
(312) 521- Chicago United States Cellular Corp 60606-3704 WIRELESS 02/09/2004
(312) 523- Bridgeview Sprint Spectrum 60455-1558 PCS -
(312) 523- Bridgeview Sprint Spectrum 60455-1558 PCS 10/27/2010
(312) 524- New Cingular Wireless Pcs WIRELESS -
(312) 525- Bensenville United States Cellular Corp 60106-1634 WIRELESS 03/05/2004
(312) 526- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 526- CHICAGO Xo Illinois 60611 CLEC 10/15/2010
(312) 527- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS0 RBOC -
(312) 528- CHICAGO Xo Illinois 60611 CLEC 11/15/1999
(312) 528- CHICAGO Xo Illinois 60611 CLEC 12/22/2010
(312) 529- Chicago At&T Local 60606-3704 CHICAGO CLEC -
(312) 529- Chicago Globalcom 60606-3704 CLEC 05/13/2005
(312) 529- Chicago Xo Illinois 60606-3704 CLEC 01/15/2010
(312) 530- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 532- Chicago T Mobile Usa 60631-3222 CHICAGO PCS -
(312) 532- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 07/31/2008
(312) 532- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 08/20/2008
(312) 532- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 08/20/2008
(312) 532- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 08/20/2008
(312) 532- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 02/11/2008
(312) 533- Level 3 Communications CLEC 12/17/2010
(312) 533- Level 3 Communications CLEC 03/03/2005
(312) 534- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC 09/25/2008
(312) 534- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC 09/25/2008
(312) 534- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC 09/25/2008
(312) 534- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC 09/25/2008
(312) 534- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC 09/25/2008
(312) 537- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 540- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC -
(312) 542- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 544- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 544- CHICAGO Access One 60611 CLEC 01/04/2007
(312) 545- Bridgeview Sprint Spectrum 60455-1558 PCS -
(312) 545- Bridgeview Sprint Spectrum 60455-1558 PCS 08/27/2007
(312) 546- Xo Illinois CLEC 10/15/2010
(312) 546- Nextel Communications WIRELESS 09/22/2004
(312) 546- Globalcom CLEC 10/12/2004
(312) 546- Xo Illinois CLEC 03/23/2009
(312) 546- Xo Illinois CLEC 03/23/2009
(312) 547- Sprint Spectrum PCS 12/23/2010
(312) 547- Teleport Communications Group CHICAGO CLEC 10/03/2008
(312) 547- Teleport Communications Group CHICAGO CLEC 10/03/2008
(312) 547- Teleport Communications Group CHICAGO CLEC 10/03/2008
(312) 547- Teleport Communications Group CHICAGO CLEC 10/03/2008
(312) 548- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC 09/07/2007
(312) 548- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC 09/07/2007
(312) 548- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC 09/07/2007
(312) 548- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC 09/07/2007
(312) 548- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC 09/07/2007
(312) 550- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 552- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC -
(312) 554- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS0 RBOC -
(312) 554- CHICAGO Xo Illinois 60605 CLEC 12/22/2010
(312) 555- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 557- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 559- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 561- Hickory Hills Cellco Partnership Dba Verizon Wireless 60457-1075 WIRELESS 06/20/2012
(312) 561- Hickory Hills Cellco Partnership Dba Verizon Wireless 60457-1075 WIRELESS 06/21/2012
(312) 561- Hickory Hills Cellco Partnership Dba Verizon Wireless 60457-1075 WIRELESS 06/21/2012
(312) 561- Hickory Hills Cellco Partnership Dba Verizon Wireless 60457-1075 WIRELESS 06/21/2012
(312) 561- Hickory Hills T Mobile Usa 60457-1075 CHICAGO PCS 08/20/2012
(312) 561- Hickory Hills Cbeyond Communications 60457-1075 CLEC 08/29/2012
(312) 563- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC -
(312) 564- Cimco Communications CLEC 11/20/2006
(312) 564- Cimco Communications CLEC 11/20/2006
(312) 564- Cbeyond Communications CLEC 06/21/2007
(312) 564- Cimco Communications CLEC 11/20/2006
(312) 564- Ovation Communications Of Illinois CHICAGO CLEC 10/18/2007
(312) 565- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC -
(312) 566- CHICAGO Denali Spectrum License 60605 PCS 10/07/2008
(312) 566- CHICAGO Bandwidth.Com Clec 60605 CLEC 02/02/2010
(312) 567- CHICAGO Ameritech Illinois 60611 CHCG CALUMET DS0 RBOC -
(312) 568- CHICAGO Paetec Communications 60611 CHICAGO CLEC 11/13/2006
(312) 568- CHICAGO Cimco Communications 60611 CLEC 10/21/2005
(312) 568- CHICAGO Globalcom 60611 CLEC 09/07/2005
(312) 568- CHICAGO Paetec Communications 60611 CHICAGO CLEC 12/01/2006
(312) 569- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC -
(312) 569- CHICAGO Broadwing Communications 60611 CLEC 05/28/2002
(312) 569- CHICAGO Broadwing Communications 60611 CLEC 05/28/2002
(312) 569- CHICAGO Bandwidth.Com Clec 60611 CLEC 02/02/2010
(312) 571- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 572- CHICAGO Paetec Communications 60611 CLEC 09/17/2009
(312) 572- CHICAGO Paetec Communications 60611 CLEC 09/17/2009
(312) 573- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS1 RBOC -
(312) 574- CHICAGO Bandwidth.Com Clec 60606 CLEC 02/02/2010
(312) 574- CHICAGO Bandwidth.Com Clec 60606 CLEC 12/20/2010
(312) 576- New Cingular Wireless Pcs WIRELESS -
(312) 578- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 582- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS0 RBOC 05/16/2002
(312) 582- CHICAGO Cimco Communications 60605 CLEC 02/19/2009
(312) 582- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS0 RBOC 05/23/2002
(312) 582- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS0 RBOC 05/23/2002
(312) 582- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS0 RBOC 05/23/2002
(312) 582- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS0 RBOC 05/23/2002
(312) 583- CHICAGO Bandwidth.Com Clec 60605 CLEC 12/20/2010
(312) 587- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC -
(312) 588- CHICAGO Paetec Communications 60605 CHICAGO CLEC 04/13/2007
(312) 588- CHICAGO Paetec Communications 60605 CHICAGO CLEC 06/27/2007
(312) 588- CHICAGO Bandwidth.Com Clec 60605 CLEC 07/18/2011
(312) 589- CHICAGO Sprint Spectrum 60611 PCS 12/23/2010
(312) 589- CHICAGO Ovation Communications Of Illinois 60611 CHICAGO CLEC 05/05/2008
(312) 589- CHICAGO Globalcom 60611 CLEC 03/01/2006
(312) 589- CHICAGO Xo Illinois 60611 CLEC 12/22/2010
(312) 591- Ameritech Illinois CHCZ 1 RBOC -
(312) 593- Chicago T Mobile Usa 60631-3222 CHICAGO PCS -
(312) 594- Bensenville Mcimetro Access Transmission Services 60106-1634 CHICAGO CLEC 11/07/2008
(312) 594- Bensenville Mcimetro Access Transmission Services 60106-1634 CHICAGO CLEC 11/07/2008
(312) 594- Bensenville Mcimetro Access Transmission Services 60106-1634 CHICAGO CLEC 11/07/2008
(312) 594- Bensenville Mcimetro Access Transmission Services 60106-1634 CHICAGO CLEC 11/07/2008
(312) 594- Bensenville Mcimetro Access Transmission Services 60106-1634 CHICAGO CLEC 11/07/2008
(312) 595- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS0 RBOC -
(312) 600- Cygnus Telecommunications Corporation UNKNOWN 05/01/2012
(312) 600- Neutral Tandem Illinois CLEC 07/18/2012
(312) 600- Bandwidth.Com Clec CLEC 08/10/2012
(312) 600- Bandwidth.Com Clec CLEC 08/10/2012
(312) 600- Bandwidth.Com Clec CLEC 08/10/2012
(312) 600- Comcast Phone Of Illinois, Dba Comco CLEC 08/21/2012
(312) 602- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC -
(312) 604- Wood Dale Xo Illinois 60191-1254 CHICAGO CLEC -
(312) 604- Wood Dale Broadwing Communications 60191-1254 CLEC 09/27/2002
(312) 605- New Cingular Wireless Pcs WIRELESS 08/30/2012
(312) 605- New Cingular Wireless Pcs WIRELESS 08/30/2012
(312) 605- Ovation Communications Of Illinois CLEC 08/08/2012
(312) 605- New Cingular Wireless Pcs WIRELESS 08/30/2012
(312) 605- Access One CLEC 09/13/2012
(312) 606- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 608- New Cingular Wireless Pcs WIRELESS -
(312) 609- CHICAGO Sprint Spectrum 60606 PCS 12/23/2010
(312) 610- Hickory Hills Cellco Partnership Dba Verizon Wireless 60457-1075 WIRELESS 08/08/2012
(312) 610- Hickory Hills Cellco Partnership Dba Verizon Wireless 60457-1075 WIRELESS 08/08/2012
(312) 610- Hickory Hills Xo Illinois 60457-1075 CLEC 08/29/2012
(312) 610- Hickory Hills Xo Illinois 60457-1075 CLEC 08/29/2012
(312) 610- Hickory Hills Mci Worldcom Communications 60457-1075 CLEC 09/11/2012
(312) 611- UNKNOWN -
(312) 612- CHICAGO Bandwidth.Com Clec 60611 CLEC 02/02/2010
(312) 612- CHICAGO Broadwing Communications 60611 CLEC 09/15/2000
(312) 612- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC 09/08/2000
(312) 612- CHICAGO Bandwidth.Com Clec 60611 CLEC 02/02/2010
(312) 614- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC 10/19/2012
(312) 614- CHICAGO Level 3 Communications 60606 CLEC 11/15/2012
(312) 614- CHICAGO Teleport Communications Group 60606 CLEC 10/25/2012
(312) 614- CHICAGO Xo Illinois 60606 CLEC 11/12/2012
(312) 614- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC 10/19/2012
(312) 614- CHICAGO T Mobile Usa 60606 CHICAGO PCS 11/15/2012
(312) 616- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC -
(312) 618- New Cingular Wireless Pcs WIRELESS -
(312) 619- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 09/13/2012
(312) 619- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 09/13/2012
(312) 619- Chicago Teleport Communications Group 60631-3222 CLEC 10/05/2012
(312) 619- Chicago New Cingular Wireless Pcs 60631-3222 WIRELESS 10/23/2012
(312) 619- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 11/15/2012
(312) 620- Bandwidth.Com Clec CLEC 08/15/2012
(312) 620- Bandwidth.Com Clec CLEC 08/16/2012
(312) 620- Bandwidth.Com Clec CLEC 08/16/2012
(312) 620- Bandwidth.Com Clec CLEC 08/16/2012
(312) 620- Bandwidth.Com Clec CLEC 08/16/2012
(312) 620- Bandwidth.Com Clec CLEC 08/16/2012
(312) 622- New Cingular Wireless Pcs WIRELESS 02/14/2001
(312) 623- New Cingular Wireless Pcs WIRELESS -
(312) 624- Chicago Xo Illinois 60654-1501 CHICAGO CLEC 06/08/2004
(312) 624- Chicago Comcast Phone Of Illinois, Dba Comco 60654-1501 CLEC 08/01/2007
(312) 625- Oak Brook Global Naps 60523-8888 CLEC 11/12/2001
(312) 626- Infotelecom CLEC 02/06/2008
(312) 627- CHICAGO Bandwidth.Com Clec 60611 CLEC 07/18/2011
(312) 629- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 632- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS0 RBOC -
(312) 632- CHICAGO New Cingular Wireless Pcs 60611 WIRELESS 07/11/2011
(312) 634- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 636- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 637- Chicago New Cingular Wireless Pcs 60601-1014 WIRELESS 07/11/2011
(312) 639- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 641- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 643- Rcn Telecom Services Of Illinois CLEC -
(312) 645- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS2 RBOC -
(312) 646- Chicago Bandwidth.Com Clec 60601-1014 CLEC 02/02/2010
(312) 646- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC 09/19/2007
(312) 646- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC 09/19/2007
(312) 646- Chicago Paetec Communications 60601-1014 CHICAGO CLEC 01/24/2008
(312) 646- Chicago T Mobile Usa 60601-1014 CHICAGO PCS 06/17/2008
(312) 648- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 649- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 650- Chicago Xo Illinois 60654-1501 CHICAGO CLEC 11/08/2004
(312) 650- Chicago Bandwidth.Com Clec 60654-1501 CLEC 02/02/2010
(312) 651- CHICAGO Level 3 Communications 60611 CLEC 05/30/2008
(312) 651- CHICAGO Level 3 Communications 60611 CLEC 05/30/2008
(312) 653- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC -
(312) 655- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 657- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 659- New Cingular Wireless Pcs WIRELESS -
(312) 661- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS2 RBOC -
(312) 662- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS2 RBOC -
(312) 662- CHICAGO T Mobile Usa 60605 CHICAGO PCS 06/17/2008
(312) 662- CHICAGO Globalcom 60605 CLEC 06/26/2007
(312) 662- CHICAGO Globalcom 60605 CLEC 06/26/2007
(312) 662- CHICAGO T Mobile Usa 60605 CHICAGO PCS 06/17/2008
(312) 663- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 665- Chicago Teleport Communications Group 60607-4568 CHICAGO CLEC -
(312) 667- Peerless Network Of Illinois CLEC 08/31/2012
(312) 667- Peerless Network Of Illinois CLEC 09/06/2012
(312) 667- Peerless Network Of Illinois CLEC 09/06/2012
(312) 667- Peerless Network Of Illinois CLEC 09/06/2012
(312) 667- Peerless Network Of Illinois CLEC 09/06/2012
(312) 667- Peerless Network Of Illinois CLEC 09/06/2012
(312) 669- CHICAGO Sprint Spectrum 60611 PCS 12/23/2010
(312) 671- Lombard United States Cellular Corp 60148-5403 WIRELESS -
(312) 672- CHICAGO Sprint Spectrum 60611 PCS 05/16/2011
(312) 672- CHICAGO Sprint Spectrum 60611 PCS 09/28/2007
(312) 674- CHICAGO Ameritech Illinois 60611 CHCG CALUMET DS0 RBOC -
(312) 674- CHICAGO Xo Illinois 60611 CLEC 12/22/2010
(312) 675- CHICAGO Sprint Spectrum 60605 PCS 05/16/2011
(312) 675- CHICAGO Broadwing Communications 60605 CLEC 10/02/2007
(312) 675- CHICAGO Broadwing Communications 60605 CLEC 10/02/2007
(312) 675- CHICAGO Broadwing Communications 60605 CLEC 10/02/2007
(312) 675- CHICAGO Sprint Spectrum 60605 PCS 05/16/2011
(312) 676- Chicago Globalcom 60607-4568 CLEC 06/20/2006
(312) 676- Chicago Globalcom 60607-4568 CLEC 06/20/2006
(312) 676- Chicago Globalcom 60607-4568 CLEC 06/20/2006
(312) 676- Chicago Globalcom 60607-4568 CLEC 06/20/2006
(312) 676- Chicago Globalcom 60607-4568 CLEC 06/20/2006
(312) 677- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 680- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 681- CHICAGO Xo Illinois 60611 CLEC 10/15/2010
(312) 682- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 683- CHICAGO Peerless Network Of Illinois 60606 CLEC 11/30/2011
(312) 685- Lombard United States Cellular Corp 60148-5403 WIRELESS 05/13/2003
(312) 685- Lombard Bandwidth.Com Clec 60148-5403 CLEC 02/02/2010
(312) 688- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 691- La Grange Indiana Paging Ntwk 60525-2365 WIRELESS -
(312) 692- CHICAGO Sprint Spectrum 60605 PCS 12/23/2010
(312) 694- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 694- CHICAGO T Mobile Usa 60611 CHICAGO PCS 03/04/2011
(312) 696- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 697- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS0 RBOC -
(312) 698- Arlington Heights Level 3 Communications 60005-4713 CLEC 12/17/2010
(312) 700- UNKNOWN -
(312) 701- CHICAGO Xo Illinois 60606 CLEC 10/15/2010
(312) 701- CHICAGO Sprint Spectrum 60606 PCS 05/16/2011
(312) 704- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 706- Chicago Teleport Communications Group 60607-4568 CHICAGO CLEC -
(312) 708- UNKNOWN -
(312) 711- Ameritech Illinois RBOC -
(312) 713- American Messaging (Am) WIRELESS 04/16/2001
(312) 714- CHICAGO T Mobile Usa 60611 CHICAGO PCS 08/16/2006
(312) 714- CHICAGO T Mobile Usa 60611 CHICAGO PCS 07/19/2006
(312) 714- CHICAGO T Mobile Usa 60611 CHICAGO PCS 07/19/2006
(312) 714- CHICAGO T Mobile Usa 60611 CHICAGO PCS 04/04/2007
(312) 714- CHICAGO T Mobile Usa 60611 CHICAGO PCS 04/18/2007
(312) 715- CHICAGO Sprint Spectrum 60611 PCS 05/16/2011
(312) 715- CHICAGO Bandwidth.Com Clec 60611 CLEC 02/02/2010
(312) 717- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 719- Lombard United States Cellular Corp 60148-5403 WIRELESS -
(312) 725- Bandwidth.Com Clec CLEC 10/08/2008
(312) 725- Teleport Communications Group CHICAGO CLEC 07/23/2009
(312) 725- Bandwidth.Com Clec CLEC 08/10/2009
(312) 725- Teleport Communications Group CHICAGO CLEC 07/23/2009
(312) 725- Teleport Communications Group CHICAGO CLEC 07/23/2009
(312) 725- Bandwidth.Com Clec CLEC 08/10/2009
(312) 727- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS2 RBOC -
(312) 730- Chicago At&T Local 60606-3704 CHICAGO CLEC -
(312) 730- Chicago T Mobile Usa 60606-3704 CHICAGO PCS 07/17/2007
(312) 730- Chicago T Mobile Usa 60606-3704 CHICAGO PCS 07/09/2004
(312) 730- Chicago T Mobile Usa 60606-3704 CHICAGO PCS 07/09/2004
(312) 730- Chicago T Mobile Usa 60606-3704 CHICAGO PCS 02/22/2005
(312) 731- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 07/08/2005
(312) 731- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 01/28/2004
(312) 731- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 11/05/2004
(312) 731- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 06/14/2005
(312) 731- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 06/08/2004
(312) 732- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS0 RBOC -
(312) 735- Buffalo Grove Nextel Communications 60089-4557 WIRELESS 07/06/2001
(312) 738- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS0 RBOC -
(312) 740- American Messaging (Am) WIRELESS 04/13/2001
(312) 743- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC 11/15/2001
(312) 745- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS2 RBOC -
(312) 747- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS2 RBOC -
(312) 749- BURR RIDGE New Cingular Wireless Pcs 61257 WIRELESS -
(312) 751- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC -
(312) 752- Chicago T Mobile Usa 60601-1014 CHICAGO PCS 10/21/2004
(312) 752- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC 04/24/2002
(312) 752- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC 04/24/2002
(312) 752- Chicago T Mobile Usa 60601-1014 CHICAGO PCS 08/31/2004
(312) 752- Chicago T Mobile Usa 60601-1014 CHICAGO PCS 10/21/2004
(312) 753- Chicago Rcn Telecom Services Of Illinois 60654-1501 CLEC -
(312) 753- Chicago Paetec Communications 60654-1501 CHICAGO CLEC 12/10/2004
(312) 753- Chicago T Mobile Usa 60654-1501 CHICAGO PCS 05/25/2005
(312) 756- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS0 RBOC -
(312) 756- CHICAGO Level 3 Communications 60611 CLEC 04/01/2011
(312) 759- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 762- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 765- CHICAGO Sprint Spectrum 60605 PCS 02/11/2011
(312) 765- CHICAGO Ovation Communications Of Illinois 60605 CHICAGO CLEC 12/02/2008
(312) 765- CHICAGO Sprint Spectrum 60605 PCS 02/11/2011
(312) 768- Chicago Sprint Spectrum 60606-3704 PCS 02/11/2011
(312) 768- Chicago Ameritech Illinois 60606-3704 CHCG CANAL EAST DS0 RBOC 09/17/2002
(312) 768- Chicago Access One 60606-3704 CLEC 08/27/2007
(312) 768- Chicago Globalcom 60606-3704 CLEC 01/26/2005
(312) 768- Chicago Sprint Spectrum 60606-3704 PCS 05/16/2011
(312) 770- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC -
(312) 771- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 772- Denali Spectrum License PCS 08/22/2008
(312) 772- Bandwidth.Com Clec CLEC 08/10/2009
(312) 772- Bandwidth.Com Clec CLEC 08/10/2009
(312) 772- Bandwidth.Com Clec CLEC 02/02/2010
(312) 772- Denali Spectrum License PCS 08/22/2008
(312) 773- UNKNOWN -
(312) 775- CHICAGO Paetec Communications 60611 CLEC 03/19/2008
(312) 775- CHICAGO Paetec Communications 60611 CLEC 04/08/2011
(312) 777- Chicago Teleport Communications Group 60607-4568 CHICAGO CLEC -
(312) 779- UNKNOWN -
(312) 780- Elk Grove Village New Cingular Wireless Pcs 60007-5216 WIRELESS 07/11/2011
(312) 782- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 784- Chicago Globalcom 60607-4568 CLEC 07/16/2007
(312) 784- Chicago Globalcom 60607-4568 CLEC 07/16/2007
(312) 784- Chicago Globalcom 60607-4568 CLEC 07/16/2007
(312) 784- Chicago Globalcom 60607-4568 CLEC 07/16/2007
(312) 784- Chicago Globalcom 60607-4568 CLEC 07/16/2007
(312) 786- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 788- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS2 RBOC -
(312) 788- CHICAGO Globalcom 60605 CLEC 06/08/2011
(312) 788- CHICAGO Bandwidth.Com Clec 60605 CLEC 02/02/2010
(312) 788- CHICAGO Ymax Communications Corp 60605 CLEC 07/30/2008
(312) 789- CHICAGO Level 3 Communications 60605 CLEC 04/01/2011
(312) 790- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC -
(312) 793- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 794- Chicago Xo Illinois 60654-1501 CLEC 01/06/2005
(312) 794- Chicago Xo Illinois 60654-1501 CLEC 01/06/2005
(312) 795- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 798- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 799- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 799- CHICAGO T Mobile Usa 60611 CHICAGO PCS 12/03/2004
(312) 799- CHICAGO Broadwing Communications 60611 CLEC 08/16/2000
(312) 799- CHICAGO T Mobile Usa 60611 CHICAGO PCS 12/03/2004
(312) 800- Peerless Network Of Illinois CLEC 11/26/2012
(312) 800- Ovation Communications Of Illinois CLEC 11/30/2012
(312) 802- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 804- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 01/23/2002
(312) 806- New Cingular Wireless Pcs WIRELESS -
(312) 808- CHICAGO Ameritech Illinois 60611 CHCG CALUMET DS0 RBOC -
(312) 811- UNKNOWN -
(312) 813- New Cingular Wireless Pcs WIRELESS -
(312) 815- UNKNOWN -
(312) 817- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS0 RBOC -
(312) 820- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 822- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS0 RBOC -
(312) 823- CHICAGO T Mobile Usa 60605 CHICAGO PCS 06/15/2006
(312) 823- CHICAGO T Mobile Usa 60605 CHICAGO PCS 05/11/2006
(312) 823- CHICAGO T Mobile Usa 60605 CHICAGO PCS 05/11/2006
(312) 823- CHICAGO T Mobile Usa 60605 CHICAGO PCS 08/01/2005
(312) 823- CHICAGO T Mobile Usa 60605 CHICAGO PCS 08/01/2005
(312) 828- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS0 RBOC -
(312) 830- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 832- CHICAGO Ameritech Illinois 60611 CHCG ILL DEAR DS0 RBOC -
(312) 834- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS2 RBOC -
(312) 834- CHICAGO Denali Spectrum License 60605 PCS 06/21/2010
(312) 834- CHICAGO Bandwidth.Com Clec 60605 CLEC 02/02/2010
(312) 834- CHICAGO Sprint Spectrum 60605 PCS 02/11/2011
(312) 834- CHICAGO Denali Spectrum License 60605 PCS 06/21/2010
(312) 835- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 839- American Messaging (Am) WIRELESS 04/13/2001
(312) 841- New Cingular Wireless Pcs WIRELESS -
(312) 841- Denali Spectrum License PCS 04/08/2011
(312) 842- CHICAGO Ameritech Illinois 60611 CHCG CALUMET DS1 RBOC -
(312) 845- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 846- CHICAGO Denali Spectrum License 60606 PCS 04/08/2011
(312) 846- CHICAGO Teleport Communications Group 60606 CHICAGO CLEC 05/21/2001
(312) 846- CHICAGO Teleport Communications Group 60606 CHICAGO CLEC 05/21/2001
(312) 846- CHICAGO Teleport Communications Group 60606 CHICAGO CLEC 05/21/2001
(312) 846- CHICAGO Teleport Communications Group 60606 CHICAGO CLEC 05/21/2001
(312) 848- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 850- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS0 RBOC -
(312) 852- New Cingular Wireless Pcs WIRELESS -
(312) 852- Sprint Spectrum PCS 02/11/2011
(312) 853- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 854- Level 3 Communications CLEC 06/20/2008
(312) 854- Level 3 Communications CLEC 06/20/2008
(312) 854- Cbeyond Communications CLEC 07/09/2008
(312) 855- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 857- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 857- CHICAGO Bandwidth.Com Clec 60606 CLEC 02/02/2010
(312) 857- CHICAGO Bandwidth.Com Clec 60606 CLEC 02/02/2010
(312) 859- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 861- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC -
(312) 862- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC 02/07/2006
(312) 862- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC 02/07/2006
(312) 862- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC 02/07/2006
(312) 862- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC 02/07/2006
(312) 862- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC 02/07/2006
(312) 863- Chicago Ovation Communications Of Illinois 60605-1029 CHICAGO CLEC 04/10/2001
(312) 863- Chicago T Mobile Usa 60605-1029 CHICAGO PCS 05/25/2005
(312) 863- Chicago Xo Illinois 60605-1029 CHICAGO CLEC 02/15/2000
(312) 863- Chicago Xo Illinois 60605-1029 CHICAGO CLEC 02/15/2000
(312) 863- Chicago Xo Illinois 60605-1029 CHICAGO CLEC 02/15/2000
(312) 864- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC -
(312) 867- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC -
(312) 869- CHICAGO Denali Spectrum License 60611 PCS 10/07/2008
(312) 869- CHICAGO Bandwidth.Com Clec 60611 CLEC 02/02/2010
(312) 869- CHICAGO Bandwidth.Com Clec 60611 CLEC 02/02/2010
(312) 870- Chicago Bandwidth.Com Clec 60607-4568 CLEC 02/02/2010
(312) 872- UNKNOWN -
(312) 875- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 878- Peerless Network Of Illinois CLEC 02/04/2008
(312) 878- Level 3 Communications CLEC 05/30/2008
(312) 878- Peerless Network Of Illinois CLEC 02/06/2008
(312) 878- Peerless Network Of Illinois CLEC 02/06/2008
(312) 878- Level 3 Communications CLEC 05/30/2008
(312) 878- Peerless Network Of Illinois CLEC 04/01/2008
(312) 879- CHICAGO Bandwidth.Com Clec 60611 CLEC 12/14/2011
(312) 880- CHICAGO Globalcom 60605 CLEC 06/08/2011
(312) 880- CHICAGO Bandwidth.Com Clec 60605 CLEC 02/02/2010
(312) 880- CHICAGO Bandwidth.Com Clec 60605 CLEC 02/02/2010
(312) 881- Chicago Ameritech Illinois 60605-1029 CHCG CALUMET DS1 RBOC 05/14/2002
(312) 881- Chicago Teleport Communications Group 60605-1029 CHICAGO CLEC 05/16/2000
(312) 881- Chicago Teleport Communications Group 60605-1029 CHICAGO CLEC 05/16/2000
(312) 881- Chicago Broadwing Communications 60605-1029 CLEC 07/05/2000
(312) 881- Chicago New Cingular Wireless Pcs 60605-1029 WIRELESS 07/11/2011
(312) 884- Chicago Ovation Communications Of Illinois 60605-1029 CHICAGO CLEC 04/10/2001
(312) 884- Chicago Broadwing Communications 60605-1029 CLEC 08/04/2000
(312) 884- Chicago Broadwing Communications 60605-1029 CLEC 03/09/2000
(312) 884- Chicago Broadwing Communications 60605-1029 CLEC 05/26/2000
(312) 884- Chicago Bandwidth.Com Clec 60605-1029 CLEC 02/02/2010
(312) 887- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS0 RBOC -
(312) 887- CHICAGO Sprint Spectrum 60611 PCS 02/11/2011
(312) 888- New Cingular Wireless Pcs WIRELESS 03/01/2012
(312) 888- Comcast Phone Of Illinois, Dba Comco CLEC 02/10/2012
(312) 888- Cygnus Telecommunications Corporation UNKNOWN 01/24/2012
(312) 888- New Cingular Wireless Pcs WIRELESS 03/01/2012
(312) 888- Cygnus Telecommunications Corporation UNKNOWN 01/24/2012
(312) 890- Bridgeview Sprint Spectrum 60455-1558 PCS -
(312) 890- Bridgeview Sprint Spectrum 60455-1558 PCS 10/27/2010
(312) 890- Bridgeview Sprint Spectrum 60455-1558 PCS 10/27/2010
(312) 890- Bridgeview Sprint Spectrum 60455-1558 PCS 10/27/2010
(312) 891- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 893- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC -
(312) 894- Bensenville New Cingular Wireless Pcs 60106-1634 WIRELESS 07/11/2011
(312) 896- Chicago Broadwing Communications 60601-1014 CHICAGO CLEC -
(312) 899- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS0 RBOC -
(312) 900- UNKNOWN -
(312) 902- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 904- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 905- CHICAGO Sprint Spectrum 60606 PCS 02/11/2011
(312) 905- CHICAGO Sprint Spectrum 60606 PCS 02/11/2011
(312) 906- CHICAGO Infotelecom 60611 CLEC 06/10/2011
(312) 908- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 910- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 912- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS0 RBOC -
(312) 912- CHICAGO T Mobile Usa 60611 CHICAGO PCS 05/17/2007
(312) 912- CHICAGO T Mobile Usa 60611 CHICAGO PCS 10/08/2007
(312) 912- CHICAGO Cimco Communications 60611 CLEC 09/15/2010
(312) 912- CHICAGO Ymax Communications Corp 60611 CLEC 07/30/2008
(312) 913- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 915- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 917- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 920- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS3 RBOC -
(312) 921- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC 07/22/2008
(312) 921- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC 07/22/2008
(312) 921- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC 07/22/2008
(312) 921- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC 07/22/2008
(312) 921- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC 07/22/2008
(312) 922- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 924- Chicago Paetec Communications 60605-1842 CHICAGO CLEC -
(312) 926- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 928- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS0 RBOC -
(312) 929- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 04/27/2006
(312) 929- Chicago Paetec Communications 60631-3222 CLEC 11/16/2009
(312) 929- Chicago Comcast Phone Of Illinois, Dba Comco 60631-3222 CLEC 11/21/2006
(312) 929- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 10/23/2008
(312) 929- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 01/28/2008
(312) 929- Chicago T Mobile Usa 60631-3222 CHICAGO PCS 07/17/2007
(312) 931- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS4 RBOC -
(312) 931- CHICAGO Xo Illinois 60606 CLEC 12/22/2010
(312) 931- CHICAGO Sprint Spectrum 60606 PCS 12/23/2010
(312) 932- CHICAGO Broadwing Communications 60611 CLEC 11/19/2001
(312) 932- CHICAGO Broadwing Communications 60611 CLEC 06/19/2000
(312) 935- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 938- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC -
(312) 941- Burr Ridge Usa Mobility Wireless 60527-7955 WIRELESS -
(312) 943- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 945- CHICAGO Ameritech Illinois 60611 CHCG CALUMET DS0 RBOC -
(312) 945- CHICAGO Denali Spectrum License 60611 PCS 04/08/2011
(312) 945- CHICAGO Bandwidth.Com Clec 60611 CLEC 02/02/2010
(312) 945- CHICAGO Bandwidth.Com Clec 60611 CLEC 02/02/2010
(312) 946- CHICAGO Ameritech Illinois 60611 CHCG LAKESHORE RBOC -
(312) 947- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC 11/22/2010
(312) 947- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC 11/22/2010
(312) 947- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC 11/22/2010
(312) 947- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC 11/22/2010
(312) 947- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC 11/22/2010
(312) 948- Chicago Ovation Communications Of Illinois 60605-1029 CHICAGO CLEC 04/10/2001
(312) 948- Chicago Ameritech Illinois 60605-1029 CHCG MONROE DS0 RBOC 05/14/2002
(312) 948- Chicago Broadwing Communications 60605-1029 CLEC 05/07/2002
(312) 948- Chicago Broadwing Communications 60605-1029 CLEC 05/07/2002
(312) 948- Chicago Level 3 Communications 60605-1029 CLEC 07/13/2011
(312) 950- UNKNOWN -
(312) 952- New Cingular Wireless Pcs WIRELESS -
(312) 954- CHICAGO Ameritech Illinois 60611 CHCG CANAL EAST DS3 RBOC -
(312) 957- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS2 RBOC -
(312) 957- CHICAGO Level 3 Communications 60605 CLEC 06/06/2006
(312) 957- CHICAGO Level 3 Communications 60605 CLEC 06/06/2006
(312) 958- Ameritech Illinois RBOC -
(312) 960- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS6 RBOC -
(312) 962- Chicago Global Crossing Local Services 60606-1784 CHICAGO CLEC -
(312) 965- Cellco Partnership Dba Verizon Wireless WIRELESS -
(312) 969- Northbrook Cellco Partnership Dba Verizon Wireless 60062-6108 WIRELESS -
(312) 970- CHICAGO Bandwidth.Com Clec 60611 CLEC 12/16/2008
(312) 970- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC 04/19/2001
(312) 972- New Cingular Wireless Pcs WIRELESS -
(312) 976- UNKNOWN -
(312) 979- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS0 RBOC -
(312) 981- Chicago Ovation Communications Of Illinois 60605-1029 CHICAGO CLEC 04/10/2001
(312) 981- Chicago Ameritech Illinois 60605-1029 CHCG SUPERIOR DS1 RBOC 11/12/2001
(312) 981- Chicago Ameritech Illinois 60605-1029 CHCG SUPERIOR DS1 RBOC 04/21/2000
(312) 981- Chicago Ovation Communications Of Illinois 60605-1029 CHICAGO CLEC 04/18/2007
(312) 981- Chicago New Cingular Wireless Pcs 60605-1029 WIRELESS 07/11/2011
(312) 983- CHICAGO Sprint Spectrum 60605 PCS 12/23/2010
(312) 983- CHICAGO Xo Illinois 60605 CLEC 12/22/2010
(312) 985- Chicago Ovation Communications Of Illinois 60605-1029 CHICAGO CLEC 04/10/2001
(312) 985- Chicago Level 3 Communications 60605-1029 CLEC 02/24/2011
(312) 985- Chicago Ameritech Illinois 60605-1029 CHCG CANAL EAST DS3 RBOC 05/19/2000
(312) 985- Chicago Bandwidth.Com Clec 60605-1029 CLEC 02/02/2010
(312) 985- Chicago Ameritech Illinois 60605-1029 CHCG CANAL EAST DS3 RBOC 03/29/2000
(312) 986- CHICAGO Ameritech Illinois 60605 CHCG WABASH DS3 RBOC -
(312) 988- CHICAGO Ameritech Illinois 60611 CHCG SUPERIOR DS2 RBOC -
(312) 990- New Cingular Wireless Pcs WIRELESS -
(312) 992- CHICAGO Ameritech Illinois 60606 CHCG FRANKLIN DS1 RBOC -
(312) 994- Chicago Ovation Communications Of Illinois 60605-1029 CHICAGO CLEC 04/10/2001
(312) 994- Chicago Broadwing Communications 60605-1029 CLEC 08/26/2002
(312) 994- Chicago Ovation Communications Of Illinois 60605-1029 CHICAGO CLEC 07/29/2009
(312) 994- Chicago Globalcom 60605-1029 CLEC 08/03/2000
(312) 994- Chicago Ovation Communications Of Illinois 60605-1029 CHICAGO CLEC 06/13/2000
(312) 997- CHICAGO Ameritech Illinois 60611 CHCG MONROE DS1 RBOC -
(312) 999- Bandwidth.Com Clec CLEC 07/18/2011
(312) 999- Xo Illinois CLEC 11/04/2010
(312) 999- Xo Illinois CLEC 11/18/2010
(312) 999- Xo Illinois CLEC 11/18/2010
(312) 999- Bandwidth.Com Clec CLEC 07/18/2011


Cities that Use 312 Area Code

Chicago, Lombard, Bridgeview, Arlington Heights, Schaumburg, Burr Ridge, Hickory Hills, Bensenville, Buffalo Grove, Wood Dale, Elk Grove Village, Oak Brook, Elmhurst, La Grange, and Northbrook

312 Area Code External Links