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: 888

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-888 A Twin Lake MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-888 0 Twin Lake MI   543C ONVOY, LLCV - MI 348   2016-02-24   
231-888 1 Twin Lake MI   543C ONVOY, LLCV - MI 348   2016-02-24   
231-888 2 Twin Lake MI   991E BANDWIDTH.COM CLEC, LLC - MI 348   2019-05-20   
231-888 3 Twin Lake MI   624H ONVOY SPECTRUM, LLC 348   2021-06-20   
231-888 4 Twin Lake MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2018-04-15   
231-888 5 Twin Lake MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2018-04-15   
231-888 6 Twin Lake MI   508J CENTURYLINK COMMUNICATIONS, LLC 348   2015-09-19   
231-888 7 Twin Lake MI   543C ONVOY, LLCV - MI 348   2015-08-15   
231-888 8 Twin Lake MI   543C ONVOY, LLCV - MI 348   2015-08-15   

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

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