Local Calling Guide

Area code/prefix search

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

NXX: 724

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
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      

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

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