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
312-212 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-212 0 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-04-06   
312-212 1 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-212 2 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-212 3 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-04-06   
312-212 4 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2005-07-30   
312-212 5 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2005-07-30   
312-212 6 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-212 7 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2005-07-30   
312-212 8 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-12-08   
312-212 9 Chicago Zone 01-Wabash IL   667E SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE 358   2007-08-02   

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

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