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
312-469 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358      
312-469 0 Chicago Zone 01-Superior IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-469 1 Chicago Zone 01-Superior IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2001-08-16   
312-469 2 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-469 3 Chicago Zone 01-Superior IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2017-01-02   
312-469 4 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-469 5 Chicago Zone 01-Superior IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2001-08-16   
312-469 6 Chicago Zone 01-Superior IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2001-08-16   
312-469 7 Chicago Zone 01-Superior IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2002-08-28   
312-469 8 Chicago Zone 01-Superior IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2002-07-01   
312-469 9 Chicago Zone 01-Superior IL   6664 SPRINT SPECTRUM L.P. 358   2004-10-01   

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

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