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
312-546 A Chicago Zone 01-Wabash IL CHCGILGMRS0  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-546 0 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2010-10-27   
312-546 1 Chicago Zone 01-Wabash IL   6664 SPRINT SPECTRUM L.P. 358   2004-01-11   
312-546 2 Chicago Zone 01-Wabash IL   6664 SPRINT SPECTRUM L.P. 358   2004-10-22   
312-546 3 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-04-01   
312-546 4 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-546 5 Chicago Zone 01-Wabash IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2004-11-06   
312-546 6 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-04-01   
312-546 7 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2009-04-18   
312-546 8 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2009-04-18   
312-546 9 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2009-04-18   

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

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