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
312-291 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-291 0 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-291 1 Chicago Zone 01-Wabash IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-06-17   
312-291 2 Chicago Zone 01-Wabash IL   5917 FIRST COMMUNICATIONS, LLC 358   2010-03-01   
312-291 3 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2005-12-12   
312-291 4 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2005-12-12   
312-291 5 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2006-01-20   
312-291 6 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-06-23   
312-291 7 Chicago Zone 01-Wabash IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2006-05-25   
312-291 8 Chicago Zone 01-Wabash IL   7607 COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 358   2011-06-05   
312-291 9 Chicago Zone 01-Wabash IL   7607 COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 358   2010-06-09   

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

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