Local Calling Guide

Area code/prefix search

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

NXX: 978

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-978 A Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358      
312-978 0 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 1 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 2 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 3 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 4 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 5 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 6 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 7 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 8 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   
312-978 9 Chicago Zone 01-Calumet IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2013-12-06   

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

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