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
312-583 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-583 0 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-583 1 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-583 2 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-583 3 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-583 4 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-583 5 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-583 6 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-583 7 Chicago Zone 01-Wabash IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-01-16   
312-583 8 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-583 9 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      

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

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