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: 569

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-569 A Santa Monica: Santa Monica DA CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2026-07-12   
424-569 0 Santa Monica: Santa Monica DA CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2026-07-12   
424-569 1 Santa Monica: Santa Monica DA CA LSANCARCYDX  732J NUSO, LLC 730   2026-07-13   
424-569 7 Santa Monica: Santa Monica DA CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2026-07-20   
424-569 8 Santa Monica: Santa Monica DA CA   649C ONVOY, LLC - CA 730   2026-07-20   
424-569 9 Santa Monica: Santa Monica DA CA   649C ONVOY, LLC - CA 730   2026-07-20   

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

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