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: 224

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-224 A Fremont MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348      
231-224 0 Fremont MI   543C ONVOY, LLCV - MI 348   2023-08-12   
231-224 2 Fremont MI   145J TERRA NOVA TELECOM INC. 348   2024-02-15   
231-224 3 Fremont MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2007-05-11   
231-224 4 Fremont MI   543C ONVOY, LLCV - MI 348   2022-09-30   
231-224 5 Fremont MI   543C ONVOY, LLCV - MI 348   2023-07-08   
231-224 6 Fremont MI   991E BANDWIDTH.COM CLEC, LLC - MI 348   2011-02-25   
231-224 7 Fremont MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2024-06-14   
231-224 8 Fremont MI   543C ONVOY, LLCV - MI 348   2023-10-08   
231-224 9 Fremont MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2023-09-22   

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

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