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: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-428 A Chicago Zone 01-Wabash IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-428 0 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-428 1 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-428 2 Chicago Zone 01-Wabash IL   829J PAETEC ITEL, LLC 358      
312-428 3 Chicago Zone 01-Wabash IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-428 4 Chicago Zone 01-Wabash IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-428 5 Chicago Zone 01-Wabash IL   224C ONVOY, LLC 358      
312-428 6 Chicago Zone 01-Wabash IL   224C ONVOY, LLC 358      
312-428 7 Chicago Zone 01-Wabash IL   224C ONVOY, LLC 358      
312-428 8 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-428 9 Chicago Zone 01-Wabash IL   224C ONVOY, LLC 358      

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

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