Local Calling Guide

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

NXX: 533

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-533 A Bellaire MI BLLRMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-533 0 Bellaire MI   3535 ACD TELECOM, INC. - MI 348   2004-10-23   
231-533 1 Bellaire MI   543C ONVOY, LLCV - MI 348   2016-02-24   
231-533 2 Bellaire MI   543C ONVOY, LLCV - MI 348   2013-04-01   
231-533 3 Bellaire MI   0695 FRONTIER NORTH, INC. - MI 348      
231-533 4 Bellaire MI   0695 FRONTIER NORTH, INC. - MI 348      
231-533 5 Bellaire MI   0695 FRONTIER NORTH, INC. - MI 348      
231-533 6 Bellaire MI   0695 FRONTIER NORTH, INC. - MI 348      
231-533 7 Bellaire MI   0695 FRONTIER NORTH, INC. - MI 348      
231-533 8 Bellaire MI   0695 FRONTIER NORTH, INC. - MI 348      
231-533 9 Bellaire MI   0695 FRONTIER NORTH, INC. - MI 348      

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

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