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: 291

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-291 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-291 0 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-291 1 Chicago Zone 01-Wabash IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
312-291 2 Chicago Zone 01-Wabash IL   460K FIRST COMMUNICATIONS, LLC 358      
312-291 3 Chicago Zone 01-Wabash IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-291 4 Chicago Zone 01-Wabash IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-291 5 Chicago Zone 01-Wabash IL CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-291 6 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-291 7 Chicago Zone 01-Wabash IL   460K FIRST COMMUNICATIONS, LLC 358      
312-291 8 Chicago Zone 01-Wabash IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358      
312-291 9 Chicago Zone 01-Wabash IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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