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
312-956 2 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-10-29   
312-956 3 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-10-29   
312-956 4 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-10-29   
312-956 5 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-10-29   
312-956 6 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-10-29   
312-956 7 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-10-29   
312-956 8 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-10-29   
312-956 9 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-10-29   
312-962 A CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 0 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 1 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 2 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 3 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 4 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 5 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 6 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 7 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 8 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 9 ELGNILOTGT5  5562 METROPCS, INC. 358   2014-07-21   
312-964 A CHCGIL24DS6  224C ONVOY, LLC 358      
312-964 0 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-01-17   
312-964 1 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-01-17   
312-964 2 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-01-17   
312-964 3 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2015-09-09   
312-964 4 CHCGILCPDS9  138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 358   2015-09-09   
312-964 5 CHCGILCLXOX  516C AT&T CORP. 358   2015-09-09   
312-964 6 CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-09-09   
312-964 7 CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-09-11   
312-964 8 CHCGIL24DS6  224C ONVOY, LLC 358   2015-09-09   
312-964 9 CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2015-09-11   
312-966 A ELGNILOTGT5  5562 METROPCS, INC. 358      
312-966 0 ELGNILOTGT5  5562 METROPCS, INC. 358   2015-01-09   
312-966 1 ELGNILOTGT5  5562 METROPCS, INC. 358   2015-01-09   
312-966 2 ELGNILOTGT5  5562 METROPCS, INC. 358   2015-01-09   
312-966 3 CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2015-01-12   
312-966 4 CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2015-01-12   
312-966 5 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-01-12   
312-966 6 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-02-07   
312-966 7 ELGNILOTGT5  5562 METROPCS, INC. 358   2015-01-09   
312-966 8 CHCGILCPDS9  138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 358   2015-02-13   
312-966 9 ELGNILOTGT5  5562 METROPCS, INC. 358   2015-01-09   
312-967 A CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
312-967 0 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 1 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 2 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 3 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 4 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 5 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 6 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 7 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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