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: 403

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-403 A Williamsburg MI GDRPMIBL15Z  516C AT&T CORP. 348      
231-403 0 Williamsburg MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2013-01-05   
231-403 1 Williamsburg MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2014-09-01   
231-403 2 Williamsburg MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2012-06-01   
231-403 3 Williamsburg MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2013-03-18   
231-403 4 Williamsburg MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2016-04-11   
231-403 5 Williamsburg MI GDRPMIBL54Z  7701 PHONE MICHIGAN - MI 348   2013-11-09   
231-403 6 Williamsburg MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2016-04-11   
231-403 7 Williamsburg MI GDRPMIBL15Z  516C AT&T CORP. 348   2011-10-14   
231-403 8 Williamsburg MI TRCYMIMNWMD  508J CENTURYLINK COMMUNICATIONS, LLC 348   2017-10-05   
231-403 9 Williamsburg MI BRSPMI09DS0  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2015-12-31   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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