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: 729

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-729 A Irons MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-729 0 Irons MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-729 1 Irons MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2011-08-11   
231-729 2 Irons MI   543C ONVOY, LLCV - MI 348   2020-05-09   
231-729 3 Irons MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2008-12-10   
231-729 4 Irons MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2009-10-17   
231-729 5 Irons MI   516C AT&T CORP. 348   2013-02-22   
231-729 6 Irons MI   543C ONVOY, LLCV - MI 348   2020-05-09   
231-729 7 Irons MI   508J CENTURYLINK COMMUNICATIONS, LLC 348   2017-10-04   
231-729 8 Irons MI   829J PAETEC ITEL, LLC 348   2004-02-03   
231-729 9 Irons MI   543C ONVOY, LLCV - MI 348   2021-03-06   

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

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