Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 424 [Rate centres in NPA 424] [Dial plan for NPA 424]

NXX: 481

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-481 A Hawthorne CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
424-481 0 Hawthorne CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2022-10-24   
424-481 1 Hawthorne CA   026K BARR TELL USA, LLC 730   2022-06-08   
424-481 2 Hawthorne CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2022-08-13   
424-481 3 Hawthorne CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2022-08-13   
424-481 4 Hawthorne CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-08-27   
424-481 5 Hawthorne CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-08-27   
424-481 6 Hawthorne CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-08-27   
424-481 7 Hawthorne CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-08-27   
424-481 8 Hawthorne CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-08-27   
424-481 9 Hawthorne CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-05-22   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.