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: 509

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-509 A Inglewood CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2024-05-04   
424-509 0 Inglewood CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2024-05-04   
424-509 1 Inglewood CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2024-05-06   
424-509 2 Inglewood CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2024-05-06   
424-509 3 Inglewood CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-05-22   
424-509 4 Inglewood CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-05-22   
424-509 5 Inglewood CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-05-22   
424-509 6 Inglewood CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-05-22   
424-509 8 Inglewood CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-05-05   
424-509 9 Inglewood CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-05-05   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.