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: 876

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-876 A Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      

Last updated: Fri, 13 May 2022 22:16:13 UTC

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