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: 564

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-564 A Lomita CA   649C ONVOY, LLC - CA 730   2026-05-02   
424-564 0 Lomita CA   649C ONVOY, LLC - CA 730   2026-05-02   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.