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: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-203 A Alanson MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-203 0 Alanson MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-203 1 Alanson MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-203 2 Alanson MI GFTPMIEF1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348   2012-10-05   
231-203 3 Alanson MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-203 4 Alanson MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-203 5 Alanson MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2015-10-28   
231-203 6 Alanson MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2019-08-05   
231-203 7 Alanson MI TRCYMIMNWMD  508J CENTURYLINK COMMUNICATIONS LLC 348   2015-09-19   
231-203 8 Alanson MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2019-09-05   

Last updated: Tue, 24 Jan 2023 03:01:57 UTC

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