Local Calling Guide

Area code/prefix search

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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
312-460 5 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358   2005-10-03   
312-460 6 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358   2005-10-03   
312-460 7 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358   2005-10-03   
312-460 8 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-460 9 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-461 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-462 A Chicago Zone 01-Franklin IL CHCGILFRDS4  9329 AMERITECH ILLINOIS 358      
312-462 0 Chicago Zone 01-Franklin IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-12-04   
312-462 1 Chicago Zone 01-Franklin IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-11-20   
312-462 2 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-462 3 Chicago Zone 01-Franklin IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-11-01   
312-462 4 Chicago Zone 01-Franklin IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-11-01   
312-462 5 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-462 6 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-462 7 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-462 8 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-462 9 Chicago Zone 01-Franklin IL   7056 XO ILLINOIS, INC. 358   2009-06-16   
312-463 A Chicago Zone 01-Canal IL CHCGILCLDS0  9329 AMERITECH ILLINOIS 358      
312-463 0 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-463 1 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-463 2 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-463 3 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-463 4 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-463 5 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-463 6 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-463 7 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-463 8 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-463 9 Chicago Zone 01-Canal IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-09-20   
312-464 A Chicago Zone 01-Illinois Dearborn IL CHCGILIDDS0  9329 AMERITECH ILLINOIS 358      
312-465 A Chicago Zone 01-Calumet IL CHCGILWBXEZ  8760 US XCHANGE OF ILLINOIS LLC DBA CHOICE ONE COMM IL 358   2009-05-17   
312-465 0 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2011-09-29   
312-465 1 Chicago Zone 01-Calumet IL   8760 US XCHANGE OF ILLINOIS LLC DBA CHOICE ONE COMM IL 358   2009-05-17   
312-465 2 Chicago Zone 01-Calumet IL   7607 COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 358   2011-09-17   
312-465 3 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2011-09-29   
312-465 4 Chicago Zone 01-Calumet IL   2491 CBEYOND COMMUNICATIONS, LLC - IL 358   2011-09-08   
312-465 5 Chicago Zone 01-Calumet IL   2491 CBEYOND COMMUNICATIONS, LLC - IL 358   2011-09-08   
312-465 6 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2011-09-29   
312-465 7 Chicago Zone 01-Calumet IL   4717 PAETEC COMMUNICATIONS, INC. - IL 358   2012-06-07   
312-465 8 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2012-06-07   
312-465 9 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2012-06-07   
312-466 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 AMERITECH ILLINOIS 358      
312-467 A Chicago Zone 01-Illinois Dearborn IL CHCGILIDDS2  9329 AMERITECH ILLINOIS 358      
312-468 A Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358      
312-468 0 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-28   
312-468 1 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-28   
312-468 2 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-28   
312-468 3 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-28   
312-468 4 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-28   
312-468 5 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-28   
312-468 6 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-28   

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Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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