Local Calling Guide

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NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-962 3 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 4 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 5 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 6 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 7 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 8 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-962 9 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358   2014-07-21   
312-963 A Chicago Zone 01-Wabash IL LBRDILGOAMD  6630 USA MOBILITY WIRELESS, INC. 358      
312-964 A Chicago Zone 01-Calumet IL CHCGIL24DS6  224C ONVOY, LLC 358      
312-964 0 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-01-17   
312-964 1 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-01-17   
312-964 2 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-01-17   
312-964 3 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2015-09-09   
312-964 4 Chicago Zone 01-Calumet IL   138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 358   2015-09-09   
312-964 5 Chicago Zone 01-Calumet IL   516C AT&T CORP. 358   2015-09-09   
312-964 6 Chicago Zone 01-Calumet IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-09-09   
312-964 7 Chicago Zone 01-Calumet IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-09-11   
312-964 8 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-09-09   
312-964 9 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2015-09-11   
312-965 A Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-966 A Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358      
312-966 0 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358   2015-01-09   
312-966 1 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358   2015-01-09   
312-966 2 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358   2015-01-09   
312-966 3 Chicago Zone 01-Calumet IL   829J PAETEC ITEL, LLC 358   2015-01-12   
312-966 4 Chicago Zone 01-Calumet IL   829J PAETEC ITEL, LLC 358   2015-01-12   
312-966 5 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-01-12   
312-966 6 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-02-07   
312-966 7 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358   2015-01-09   
312-966 8 Chicago Zone 01-Calumet IL   138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 358   2015-02-13   
312-966 9 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358   2015-01-09   
312-967 A Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
312-967 0 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 1 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 2 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 3 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 4 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 5 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 6 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 7 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 8 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-967 9 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-10-04   
312-968 A La Grange IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-968 0 La Grange IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-969 A La Grange IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-969 0 La Grange IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-969 1 La Grange IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-970 A Chicago Zone 01-Illinois Dearborn IL CHCGILIDDS0  9329 ILLINOIS BELL TEL CO 358      
312-970 0 Chicago Zone 01-Illinois Dearborn IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2009-01-13   
312-970 1 Chicago Zone 01-Illinois Dearborn IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   

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

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