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: 279

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-279 A Big Rapids MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348      
231-279 0 Big Rapids MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2025-04-14   
231-279 1 Big Rapids MI   543C ONVOY, LLCV - MI 348   2021-11-15   
231-279 2 Big Rapids MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2020-02-10   
231-279 3 Big Rapids MI   624H ONVOY SPECTRUM, LLC 348   2021-06-18   
231-279 4 Big Rapids MI   5562 METROPCS, INC. 348   2021-10-15   
231-279 6 Big Rapids MI   543C ONVOY, LLCV - MI 348   2021-11-15   
231-279 7 Big Rapids MI   145J TERRA NOVA TELECOM INC. 348   2024-02-14   
231-279 8 Big Rapids MI   543C ONVOY, LLCV - MI 348   2020-11-20   
231-279 9 Big Rapids MI   543C ONVOY, LLCV - MI 348   2020-11-20   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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