Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: CHCGIL249MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
312-815 A Chicago Zone 01-Calumet IL 996H AIRESPRING, INC. 358      
312-815 0 Chicago Zone 01-Calumet IL 996H AIRESPRING, INC. 358   2018-06-21   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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