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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-823 A Chicago Zone 01-Wabash IL CHCGILWBDS0  9329 AMERITECH ILLINOIS 358      
312-823 0 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2006-06-27   
312-823 1 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-823 2 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2006-06-27   
312-823 3 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2006-05-22   
312-823 4 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2006-05-22   
312-823 5 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2006-05-22   
312-823 6 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2005-09-15   
312-823 7 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2005-09-15   
312-823 8 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2005-09-15   
312-823 9 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2005-09-15   

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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