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: 391

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-391 A Hawthorne CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
424-391 0 Hawthorne CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2015-05-01   
424-391 1 Hawthorne CA   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2015-05-15   
424-391 2 Hawthorne CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2015-09-16   
424-391 3 Hawthorne CA   649C ONVOY, LLC - CA 730   2016-04-05   
424-391 4 Hawthorne CA   6529 T-MOBILE USA, INC. 730   2015-04-30   
424-391 5 Hawthorne CA   6529 T-MOBILE USA, INC. 730   2015-04-30   
424-391 6 Hawthorne CA   6529 T-MOBILE USA, INC. 730   2015-04-30   
424-391 7 Hawthorne CA   6529 T-MOBILE USA, INC. 730   2018-07-21   
424-391 8 Hawthorne CA   649C ONVOY, LLC - CA 730   2016-03-14   
424-391 9 Hawthorne CA   6529 T-MOBILE USA, INC. 730   2015-04-30   

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

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