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: 546

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-546 A Torrance CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2025-03-24   
424-546 0 Torrance CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2025-03-24   
424-546 1 Torrance CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2025-10-27   
424-546 2 Torrance CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-05-09   
424-546 3 Torrance CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-05-09   
424-546 4 Torrance CA   649C ONVOY, LLC - CA 730   2026-08-02   
424-546 5 Torrance CA   649C ONVOY, LLC - CA 730   2026-08-02   
424-546 8 Torrance CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-06-25   
424-546 9 Torrance CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-06-25   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.