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: 293

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-293 A Frankfort MI BRSPMI099MD  321J HD CARRIER LLC 348      
231-293 0 Frankfort MI   543C ONVOY, LLCV - MI 348   2023-04-28   
231-293 1 Frankfort MI   543C ONVOY, LLCV - MI 348   2022-12-22   
231-293 2 Frankfort MI   543C ONVOY, LLCV - MI 348   2021-07-11   
231-293 3 Frankfort MI   543C ONVOY, LLCV - MI 348   2021-07-06   
231-293 4 Frankfort MI   624H ONVOY SPECTRUM, LLC 348   2021-07-06   
231-293 5 Frankfort MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2025-02-24   
231-293 6 Frankfort MI   543C ONVOY, LLCV - MI 348   2021-12-19   
231-293 7 Frankfort MI   543C ONVOY, LLCV - MI 348   2022-03-04   
231-293 8 Frankfort MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2021-07-15   
231-293 9 Frankfort MI   321J HD CARRIER LLC 348   2021-07-05   

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

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