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
312-216 6 Chicago Zone 01-Calumet IL CHCGILWUDS0  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2012-06-17   
312-216 7 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-01-10   
312-216 8 Chicago Zone 01-Calumet IL CHCGILCPDS5  4717 PAETEC COMMUNICATIONS, INC. - IL 358   2012-04-16   
312-216 9 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2012-12-23   
312-217 A Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 0 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 1 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 2 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 3 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 4 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 5 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 6 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 7 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 8 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-217 9 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-218 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-219 A Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
312-219 0 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2013-02-25   
312-219 1 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2012-12-24   
312-219 2 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-06-24   
312-219 3 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-06-24   
312-219 4 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-06-24   
312-219 5 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-06-24   
312-219 6 Chicago Zone 01-Calumet IL CHCGILWBXEZ  8760 US XCHANGE OF ILLINOIS LLC DBA CHOICE ONE COMM IL 358   2012-06-21   
312-219 7 Chicago Zone 01-Calumet IL CHCGILCLDS7  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2012-08-01   
312-219 8 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2012-08-03   
312-219 9 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2012-08-03   
312-220 A Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 AMERITECH ILLINOIS 358      
312-221 A Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358      
312-221 0 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-08   
312-221 1 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-08   
312-221 2 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-08   
312-221 3 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-08   
312-221 4 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-08   
312-221 5 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-08   
312-221 6 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-08   
312-221 7 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-08   
312-221 8 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-09   
312-221 9 Chicago Zone 01-Calumet IL ARLHILJQBMD  6664 SPRINT SPECTRUM L.P. 358   2011-08-08   
312-222 A Chicago Zone 01-Illinois Dearborn IL CHCGILIDDS0  9329 AMERITECH ILLINOIS 358      
312-223 A Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 AMERITECH ILLINOIS 358      
312-224 A Chicago Zone 01-Franklin IL EKGVILAADS0  7721 BROADWING COMMUNICATIONS, LLC - IL 358      
312-225 A Chicago Zone 01-Calumet IL CHCGILCADS1  9329 AMERITECH ILLINOIS 358      
312-226 A Chicago Zone 01-Monroe IL CHCGILMODS1  9329 AMERITECH ILLINOIS 358      
312-227 A Chicago Zone 01-Calumet IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358      
312-227 0 Chicago Zone 01-Calumet IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358   2010-10-15   
312-227 1 Chicago Zone 01-Calumet IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358   2010-10-15   
312-227 2 Chicago Zone 01-Calumet IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358   2010-10-15   
312-227 3 Chicago Zone 01-Calumet IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358   2010-10-15   
312-227 4 Chicago Zone 01-Calumet IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358   2010-10-15   

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Last updated: Sun, 28 Feb 2021 19:06:05 UTC

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