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: 449

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-449 A Chicago Zone 01-Calumet IL   700J WAVENATION, LLC 358   2025-09-14   
312-449 0 Chicago Zone 01-Calumet IL   700J WAVENATION, LLC 358   2025-09-14   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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