Local Calling Guide

Area code/prefix search

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NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

NXX: 752

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-752 A Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-752 0 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2004-11-20   
312-752 1 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2002-06-11   
312-752 2 Chicago Zone 01-Calumet IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2022-06-28   
312-752 3 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2002-06-11   
312-752 4 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2002-06-11   
312-752 5 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2004-10-05   
312-752 6 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2004-10-05   
312-752 7 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2004-10-05   
312-752 8 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2004-11-20   
312-752 9 Chicago Zone 01-Calumet IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2022-06-28   

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

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