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   2009-01-06   
312-428 1 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
312-428 2 Chicago Zone 01-Wabash IL CHCGILWUX1X  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2009-10-23   
312-428 3 Chicago Zone 01-Wabash IL CHCGILTCDS4  7056 XO ILLINOIS, INC. 358   2010-02-14   
312-428 4 Chicago Zone 01-Wabash IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2004-06-07   
312-428 5 Chicago Zone 01-Wabash IL OKBRILDODS0  259E YMAX COMMUNICATIONS CORP. - IL 358   2009-09-04   
312-428 6 Chicago Zone 01-Wabash IL OKBRILDODS0  259E YMAX COMMUNICATIONS CORP. - IL 358   2009-09-04   
312-428 7 Chicago Zone 01-Wabash IL OKBRILDODS0  259E YMAX COMMUNICATIONS CORP. - IL 358   2009-09-04   
312-428 8 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
312-428 9 Chicago Zone 01-Wabash IL OKBRILDODS0  259E YMAX COMMUNICATIONS CORP. - IL 358   2009-09-04   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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