Local Calling Guide

Area code/prefix search

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Chicago Zone 01-Calumet, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-964 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-01-17   
312-964 3   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2015-09-09   
312-964 4   138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 358   2015-09-09   
312-964 5   516C AT&T CORP. 358   2015-09-09   
312-964 6   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-09-09   
312-964 7   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-09-11   
312-964 8   224C ONVOY, LLC 358   2015-09-09   
312-964 9   460K FIRST COMMUNICATIONS, LLC 358   2015-09-11   
312-966 A ELGNILOTGT5  5562 METROPCS, INC. 358      
312-966 0   5562 METROPCS, INC. 358   2015-01-09   
312-966 1   5562 METROPCS, INC. 358   2015-01-09   
312-966 2   5562 METROPCS, INC. 358   2015-01-09   
312-966 3   829J PAETEC ITEL, LLC 358   2015-01-12   
312-966 4   829J PAETEC ITEL, LLC 358   2015-01-12   
312-966 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-01-12   
312-966 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-02-07   
312-966 7   5562 METROPCS, INC. 358   2015-01-09   
312-966 8   138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 358   2015-02-13   
312-966 9   5562 METROPCS, INC. 358   2015-01-09   
312-967 A CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
312-967 0   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 1   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 2   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 3   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 4   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 5   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 6   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 7   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 8   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 9   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-971 A CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
312-971 0   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-971 1   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-971 2   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-971 3   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-971 4   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-971 5   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-971 6   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-971 7   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-971 8   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-971 9   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-06-28   
312-973 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-973 0   6529 T-MOBILE USA, INC. 358   2014-04-15   
312-973 1   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-05-24   
312-973 2   6529 T-MOBILE USA, INC. 358   2014-04-15   
312-973 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2014-04-12   
312-973 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2014-04-12   
312-973 5   138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 358   2014-04-15   
312-973 6   6529 T-MOBILE USA, INC. 358   2014-04-15   
312-973 7   6529 T-MOBILE USA, INC. 358   2014-04-15   
312-973 8   6529 T-MOBILE USA, INC. 358   2014-04-15   
312-973 9   6529 T-MOBILE USA, INC. 358   2014-04-15   
312-975 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-975 0   6529 T-MOBILE USA, INC. 358   2015-07-08   
312-975 1   6529 T-MOBILE USA, INC. 358   2015-07-08   
312-975 2   6529 T-MOBILE USA, INC. 358   2015-07-08   
312-975 3   6529 T-MOBILE USA, INC. 358   2015-07-08   
312-975 4   6529 T-MOBILE USA, INC. 358   2015-07-08   
312-975 5   6529 T-MOBILE USA, INC. 358   2015-07-08   
312-975 6   6529 T-MOBILE USA, INC. 358   2014-11-14   
312-975 7   6529 T-MOBILE USA, INC. 358   2014-11-14   
312-975 8   6529 T-MOBILE USA, INC. 358   2014-11-14   
312-975 9   6529 T-MOBILE USA, INC. 358   2014-11-14   
312-978 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-978 0   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 1   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 2   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 3   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 4   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 5   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 6   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 7   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 8   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 9   6529 T-MOBILE USA, INC. 358   2013-12-06   
312-981 A CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2024-12-09   
312-981 0   829J PAETEC ITEL, LLC 358      
312-981 1   9329 ILLINOIS BELL TEL CO 358   2001-12-18   
312-981 2   9329 ILLINOIS BELL TEL CO 358   2001-12-07   
312-981 3   9329 ILLINOIS BELL TEL CO 358   2001-12-07   
312-981 4   9329 ILLINOIS BELL TEL CO 358   2000-06-30   
312-981 5   829J PAETEC ITEL, LLC 358      
312-981 6   9329 ILLINOIS BELL TEL CO 358   2000-06-30   
312-981 7   829J PAETEC ITEL, LLC 358   2007-05-18   
312-981 8   829J PAETEC ITEL, LLC 358   2001-01-18   
312-981 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-08-07   
312-982 A CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358      
312-982 0   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2014-11-24   
312-982 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-11-24   
312-982 2   318J COMCAST IP PHONE, LLC 358   2014-11-21   
312-982 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-11-24   
312-982 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-11-24   
312-982 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-11-24   
312-982 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-11-24   
312-982 7   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2014-11-24   
312-982 8   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2014-11-24   
312-982 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-11-24   
312-985 A CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2024-12-09   
312-985 0   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-11-08   
312-985 1   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2011-03-26   
312-985 2   9329 ILLINOIS BELL TEL CO 358   2000-07-07   

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

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