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
312-675 5 Chicago Zone 01-Wabash IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2007-10-12   
312-675 6 Chicago Zone 01-Wabash IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2007-10-12   
312-675 7 Chicago Zone 01-Wabash IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2007-10-12   
312-675 8 Chicago Zone 01-Wabash IL   259E YMAX COMMUNICATIONS CORP. - IL 358   2009-08-21   
312-675 9 Chicago Zone 01-Wabash IL   6664 SPRINT SPECTRUM L.P. 358   2011-05-26   
312-676 A Chicago Zone 01-Calumet IL CHCGIL24DS3  4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 0 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 1 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 2 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 3 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 4 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 5 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 6 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 7 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 8 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-676 9 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-08-07   
312-677 A Chicago Zone 01-Wabash IL BURGILAJCM1  6630 USA MOBILITY WIRELESS, INC. 358      
312-678 A Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358      
312-678 0 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-24   
312-678 1 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-24   
312-678 2 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-24   
312-678 3 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-23   
312-678 4 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-23   
312-678 5 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-23   
312-678 6 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-23   
312-678 7 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-23   
312-678 8 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-23   
312-678 9 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-23   
312-679 A Chicago Zone 01-Wabash IL CHCGILBWCM2  9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-680 A Chicago Zone 01-Wabash IL BURGILAJCM1  6630 USA MOBILITY WIRELESS, INC. 358      
312-681 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 AMERITECH ILLINOIS 358      
312-681 0 Chicago Zone 01-Canal IL   7056 XO ILLINOIS, INC. 358   2010-10-27   
312-681 1 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-681 2 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-681 3 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-681 4 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-681 5 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-681 6 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-681 7 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-681 8 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-681 9 Chicago Zone 01-Canal IL   7056 XO ILLINOIS, INC. 358   2010-10-27   
312-682 A Chicago Zone 01-Wabash IL BURGILAJCM1  6630 USA MOBILITY WIRELESS, INC. 358      
312-683 A Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 AMERITECH ILLINOIS 358      
312-683 0 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-683 1 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-683 2 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-683 3 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-683 4 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-683 5 Chicago Zone 01-Franklin IL   9329 AMERITECH ILLINOIS 358      
312-683 6 Chicago Zone 01-Franklin IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2013-02-08   

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

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