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: 648

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-648 A Howard City MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348      
231-648 0 Howard City MI   490J DISH WIRELESS, LLC 348   2026-01-29   
231-648 2 Howard City MI   543C ONVOY, LLCV - MI 348   2022-06-01   
231-648 3 Howard City MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2006-01-05   
231-648 5 Howard City MI   543C ONVOY, LLCV - MI 348   2022-06-01   
231-648 6 Howard City MI   792K CHARTER IP ENABLED SERVICES, LLC 348   2007-02-25   
231-648 7 Howard City MI   490J DISH WIRELESS, LLC 348   2024-06-14   
231-648 8 Howard City MI   543C ONVOY, LLCV - MI 348   2022-04-17   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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