Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-675 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-675 0 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-675 1 Chicago Zone 01-Wabash IL   6664 SPRINT SPECTRUM L.P. 358   2011-05-26   
312-675 2 Chicago Zone 01-Wabash IL   259E YMAX COMMUNICATIONS CORP. - IL 358   2009-08-21   
312-675 3 Chicago Zone 01-Wabash IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2007-10-12   
312-675 4 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-12   
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   

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

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