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
312-344 A Chicago Zone 01-Wabash IL CHCGILWBDS3  9329 AMERITECH ILLINOIS 358      
312-344 0 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-06-23   
312-344 1 Chicago Zone 01-Wabash IL   7607 COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 358   2011-06-12   
312-344 2 Chicago Zone 01-Wabash IL   5447 ACCESS ONE, INC. - IL 358   2007-02-02   
312-344 3 Chicago Zone 01-Wabash IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-08-14   
312-344 4 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-344 5 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-344 6 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-344 7 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-344 8 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-344 9 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      

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

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