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: 912

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-912 A Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-912 0 Chicago Zone 01-Canal IL CHCGIL24DS6  224C ONVOY, LLC 358      
312-912 1 Chicago Zone 01-Canal IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358      
312-912 2 Chicago Zone 01-Canal IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358      
312-912 3 Chicago Zone 01-Canal IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358      
312-912 4 Chicago Zone 01-Canal IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358      
312-912 5 Chicago Zone 01-Canal IL CHCGILMF6MD  6529 T-MOBILE USA, INC. 358      
312-912 6 Chicago Zone 01-Canal IL   460K FIRST COMMUNICATIONS, LLC 358      
312-912 7 Chicago Zone 01-Canal IL   224C ONVOY, LLC 358      
312-912 8 Chicago Zone 01-Canal IL   224C ONVOY, LLC 358      
312-912 9 Chicago Zone 01-Canal IL   224C ONVOY, LLC 358      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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