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
312-970 A Chicago Zone 01-Illinois Dearborn IL CHCGILIDDS0  9329 AMERITECH ILLINOIS 358      
312-970 0 Chicago Zone 01-Illinois Dearborn IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2009-01-13   
312-970 1 Chicago Zone 01-Illinois Dearborn IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-970 2 Chicago Zone 01-Illinois Dearborn IL   9329 AMERITECH ILLINOIS 358      
312-970 3 Chicago Zone 01-Illinois Dearborn IL   9329 AMERITECH ILLINOIS 358      
312-970 4 Chicago Zone 01-Illinois Dearborn IL   5562 METRO PCS, INC. 358   2016-12-29   
312-970 5 Chicago Zone 01-Illinois Dearborn IL   9329 AMERITECH ILLINOIS 358      
312-970 6 Chicago Zone 01-Illinois Dearborn IL   5562 METRO PCS, INC. 358   2017-01-23   
312-970 7 Chicago Zone 01-Illinois Dearborn IL   9329 AMERITECH ILLINOIS 358   2001-04-23   
312-970 8 Chicago Zone 01-Illinois Dearborn IL   9329 AMERITECH ILLINOIS 358      
312-970 9 Chicago Zone 01-Illinois Dearborn IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2009-01-13   

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

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