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
312-582 A Chicago Zone 01-Wabash IL CHCGILWBDS0  9329 AMERITECH ILLINOIS 358      
312-582 0 Chicago Zone 01-Wabash IL   6664 SPRINT SPECTRUM L.P. 358   2011-01-05   
312-582 1 Chicago Zone 01-Wabash IL   5917 FIRST COMMUNICATIONS, LLC 358   2009-03-03   
312-582 2 Chicago Zone 01-Wabash IL   5447 ACCESS ONE, INC. - IL 358   2010-07-15   
312-582 3 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358   2002-06-15   
312-582 4 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2011-01-05   
312-582 5 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358   2002-06-15   
312-582 6 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358   2002-06-15   
312-582 7 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358   2002-06-15   
312-582 8 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358   2002-06-15   
312-582 9 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358   2002-06-15   

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

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