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: 298

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-298 A Irons MI   792K CHARTER IP ENABLED SERVICES, LLC 348      
231-298 0 Irons MI   792K CHARTER IP ENABLED SERVICES, LLC 348   2021-06-27   
231-298 2 Irons MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348   2021-07-02   
231-298 4 Irons MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-12-22   
231-298 7 Irons MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-08-27   
231-298 8 Irons MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-07-22   
231-298 9 Irons MI BRSPMI09DS0  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2023-07-24   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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