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: 450

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-450 A Hesperia MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-450 0 Hesperia MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2005-03-16   
231-450 1 Hesperia MI GDRPMIBQDS1  4632 TELNET WORLDWIDE, INC. 348   2005-09-02   
231-450 2 Hesperia MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2008-10-18   
231-450 3 Hesperia MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2009-11-03   
231-450 4 Hesperia MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2011-05-26   
231-450 5 Hesperia MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2013-03-18   
231-450 6 Hesperia MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2017-05-19   
231-450 7 Hesperia MI   508J CENTURYLINK COMMUNICATIONS LLC 348   2017-10-04   
231-450 8 Hesperia MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2020-10-18   
231-450 9 Hesperia MI GDRPMIBL04Z  543C ONVOY, LLC - MI 348   2020-10-18   

Last updated: Tue, 04 May 2021 15:04:27 UTC

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