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
312-777 A Chicago Zone 01-Wabash IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 0 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 1 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 2 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 3 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 4 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 5 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 6 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 7 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 8 Chicago Zone 01-Wabash IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-777 9 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2010-10-27   

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

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