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: 261

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-261 A Ludington MI MSKGMIXK5MD  116F PENINSULA FIBER NETWORK, LLC - MI 348      
231-261 0 Ludington MI   116F PENINSULA FIBER NETWORK, LLC - MI 348   2019-02-21   
231-261 1 Ludington MI   543C ONVOY, LLCV - MI 348   2020-06-14   
231-261 2 Ludington MI   543C ONVOY, LLCV - MI 348   2020-06-14   
231-261 3 Ludington MI   543C ONVOY, LLCV - MI 348   2021-06-17   
231-261 4 Ludington MI   543C ONVOY, LLCV - MI 348   2021-02-04   
231-261 5 Ludington MI   543C ONVOY, LLCV - MI 348   2021-02-04   
231-261 6 Ludington MI   543C ONVOY, LLCV - MI 348   2021-02-04   
231-261 7 Ludington MI   543C ONVOY, LLCV - MI 348   2020-09-12   
231-261 8 Ludington MI   543C ONVOY, LLCV - MI 348   2020-09-12   
231-261 9 Ludington MI   543C ONVOY, LLCV - MI 348   2021-06-17   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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