Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Chicago Zone 04-Humboldt, IL

1 2 3 4 5 6 7 8 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-735 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-735 0   6529 T-MOBILE USA, INC. 358      
312-735 1   6529 T-MOBILE USA, INC. 358      
312-735 2   6529 T-MOBILE USA, INC. 358      
312-735 3   6529 T-MOBILE USA, INC. 358      
312-735 4   6529 T-MOBILE USA, INC. 358      
312-735 5   6529 T-MOBILE USA, INC. 358      
312-735 6   6529 T-MOBILE USA, INC. 358      
312-735 7   6529 T-MOBILE USA, INC. 358      
312-735 8   6529 T-MOBILE USA, INC. 358      
312-735 9   6529 T-MOBILE USA, INC. 358      
773-227 A CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-235 A CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-246 A HMNDINPRCM0  6795 INDIANA PAGING NETWORK, INC. 358      
773-252 A CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-269 A OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-269 0   5562 METROPCS, INC. 358   2003-10-01   
773-269 1   5562 METROPCS, INC. 358   2003-10-01   
773-269 2   9329 ILLINOIS BELL TEL CO 358   2002-03-25   
773-269 3   224C ONVOY, LLC 358   2014-09-03   
773-269 4   5562 METROPCS, INC. 358   2007-05-20   
773-269 5   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-269 6   460K FIRST COMMUNICATIONS, LLC 358   2005-07-04   
773-269 7   5562 METROPCS, INC. 358   2003-10-01   
773-269 8   5562 METROPCS, INC. 358   2003-10-01   
773-269 9   5562 METROPCS, INC. 358   2003-05-06   
773-270 A ELGNILOTGT5  5562 METROPCS, INC. 358      
773-270 0   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-05   
773-270 1   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-05   
773-270 2   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-05   
773-270 3   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-05   
773-270 4   318J COMCAST IP PHONE, LLC 358   2013-08-09   
773-270 5   318J COMCAST IP PHONE, LLC 358   2013-08-09   
773-270 6   318J COMCAST IP PHONE, LLC 358   2018-01-01   
773-270 7   5562 METROPCS, INC. 358   2009-07-25   
773-270 8   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-11-27   
773-270 9   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-06-14   
773-276 A CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-278 A CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-289 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-289 0   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-07-31   
773-289 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-289 2   6529 T-MOBILE USA, INC. 358   2004-09-05   
773-289 3   9329 ILLINOIS BELL TEL CO 358   2001-06-02   
773-289 4   9329 ILLINOIS BELL TEL CO 358   2001-06-02   
773-289 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-289 6   6529 T-MOBILE USA, INC. 358   2006-08-25   
773-289 7   6529 T-MOBILE USA, INC. 358   2004-08-23   
773-289 8   6529 T-MOBILE USA, INC. 358   2004-09-05   
773-289 9   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-292 A CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-305 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-305 0   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-305 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-305 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-305 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-305 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-305 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-305 6   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2019-12-28   
773-305 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-305 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-305 9   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-328 A CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
773-328 0   6529 T-MOBILE USA, INC. 358   2011-03-16   
773-328 1   5447 ACCESS ONE, INC. - IL 358   2010-09-19   
773-328 2   460K FIRST COMMUNICATIONS, LLC 358      
773-328 3   460K FIRST COMMUNICATIONS, LLC 358      
773-328 4   460K FIRST COMMUNICATIONS, LLC 358      
773-328 5   460K FIRST COMMUNICATIONS, LLC 358   2004-09-12   
773-328 6   460K FIRST COMMUNICATIONS, LLC 358      
773-328 7   9329 ILLINOIS BELL TEL CO 358   2001-09-10   
773-328 8   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-11-27   
773-328 9   6529 T-MOBILE USA, INC. 358   2011-03-16   
773-342 A CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-360 A CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-360 0   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
773-360 1   318J COMCAST IP PHONE, LLC 358   2007-09-07   
773-360 2   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-360 3   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-03-05   
773-360 4   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2019-02-09   
773-360 5   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-04-24   
773-360 6   460K FIRST COMMUNICATIONS, LLC 358   2006-05-12   
773-360 7   318J COMCAST IP PHONE, LLC 358   2006-06-02   
773-360 8   318J COMCAST IP PHONE, LLC 358   2006-03-31   
773-360 9   224C ONVOY, LLC 358   2022-08-21   
773-365 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-365 0   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-365 1   984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-03-30   
773-365 2   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-02-16   
773-365 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-365 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-365 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-365 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-365 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-365 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-365 9   224C ONVOY, LLC 358   2018-01-18   
773-384 A CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-394 A CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-394 0   6529 T-MOBILE USA, INC. 358   2015-08-14   
773-394 1   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2018-04-17   

1 2 3 4 5 6 7 8 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.