Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 424 [Rate centres in NPA 424] [Dial plan for NPA 424]

NXX: 520

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-520 A Compton: Compton DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2025-01-02   
424-520 0 Compton: Compton DA CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-01-03   
424-520 9 Compton: Compton DA CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2025-01-02   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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