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: 267

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-267 A Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 ILLINOIS BELL TEL CO 358      
312-267 0 Chicago Zone 01-Franklin IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-04-01   
312-267 1 Chicago Zone 01-Franklin IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-08-09   
312-267 2 Chicago Zone 01-Franklin IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-08-09   
312-267 3 Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 ILLINOIS BELL TEL CO 358      
312-267 4 Chicago Zone 01-Franklin IL CHCGIL24DS3  4604 FIRST COMMUNICATIONS, LLC - IL 358   2004-09-24   
312-267 5 Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 ILLINOIS BELL TEL CO 358   2002-06-04   
312-267 6 Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 ILLINOIS BELL TEL CO 358   2002-06-04   
312-267 7 Chicago Zone 01-Franklin IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358   2001-09-26   
312-267 8 Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 ILLINOIS BELL TEL CO 358   2002-06-04   
312-267 9 Chicago Zone 01-Franklin IL CHCGILMF4MD  5562 METROPCS, INC. 358   2009-05-22   

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

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