Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX: 210

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-210 A St James MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-210 0 St James MI   145J TERRA NOVA TELECOM INC. 348   2025-07-12   
231-210 2 St James MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-09-10   
231-210 6 St James MI GDRPMIBL06Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 348   2023-09-20   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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