Local Calling Guide

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NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-720 2 Muskegon MI   4632 INTERACTIVE SERVICES NETWORK, INC. 348      
231-720 3 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-720 4 Muskegon MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2011-01-31   
231-720 5 Muskegon MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2011-01-13   
231-720 6 Muskegon MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2010-05-03   
231-720 7 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-720 8 Muskegon MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2010-05-03   
231-720 9 Muskegon MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2011-01-31   
231-721 A Hart MI GDRPMIBLX8Z  2550 123.NET, LLC 348      
231-721 0 Hart MI   2550 123.NET, LLC 348      
231-721 1 Hart MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2021-04-20   
231-721 2 Hart MI   543C ONVOY, LLCV - MI 348   2020-11-20   
231-721 3 Hart MI   543C ONVOY, LLCV - MI 348   2020-11-20   
231-721 5 Hart MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2012-09-24   
231-721 6 Hart MI   624H ONVOY SPECTRUM, LLC 348   2021-06-19   
231-721 7 Hart MI   508J CENTURYLINK COMMUNICATIONS, LLC 348   2017-10-04   
231-721 9 Hart MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2024-01-16   
231-722 A Muskegon MI MSKGMIXKDS1  0695 FRONTIER NORTH, INC. - MI 348      
231-723 A Manistee MI MNSTMIMNDS0  9323 MICHIGAN BELL TEL CO 348      
231-724 A Muskegon MI MSKGMIXKDS1  0695 FRONTIER NORTH, INC. - MI 348      
231-724 0 Muskegon MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2010-06-01   
231-724 1 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-724 2 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-724 3 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-724 4 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-724 5 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-724 6 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-724 7 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-724 8 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-724 9 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-725 A Muskegon MI MSKGMIXKDS1  0695 FRONTIER NORTH, INC. - MI 348      
231-725 0 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-725 1 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-725 2 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-725 3 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-725 4 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-725 5 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2010-11-01   
231-725 6 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-725 7 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-725 8 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-725 9 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-726 A Muskegon MI MSKGMIXKPS0  0695 FRONTIER NORTH, INC. - MI 348      
231-726 0 Muskegon MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2013-02-09   
231-726 1 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-726 2 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-726 3 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-726 4 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-726 5 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-726 6 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-726 7 Muskegon MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2015-08-22   

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

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