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
312-566 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-566 0 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-566 1 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
312-566 2 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-566 3 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2014-04-13   
312-566 4 Chicago Zone 01-Wabash IL   5447 ACCESS ONE, INC. - IL 358   2014-05-10   
312-566 5 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-566 6 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
312-566 7 Chicago Zone 01-Wabash IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-566 8 Chicago Zone 01-Wabash IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-566 9 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      

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

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