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: 563

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-563 A Hawthorne CA   649C ONVOY, LLC - CA 730   2026-03-23   
424-563 0 Hawthorne CA   649C ONVOY, LLC - CA 730   2026-03-23   
424-563 1 Hawthorne CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2026-05-01   
424-563 2 Hawthorne CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2026-05-22   

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.