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: 433

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-433 A Santa Monica: Santa Monica DA CA SNMNCAXPXJY  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730      
424-433 0 Santa Monica: Santa Monica DA CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730   2017-10-07   
424-433 1 Santa Monica: Santa Monica DA CA LSANCARCD4S  973E RACE TELECOMMUNICATIONS, INC. - CA 730   2016-11-19   
424-433 2 Santa Monica: Santa Monica DA CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2022-10-15   
424-433 3 Santa Monica: Santa Monica DA CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2016-12-16   
424-433 4 Santa Monica: Santa Monica DA CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2016-12-16   
424-433 5 Santa Monica: Santa Monica DA CA SNMNCAXPXPY  156J RCLEC, INC. 730   2017-01-05   
424-433 6 Santa Monica: Santa Monica DA CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2017-06-09   
424-433 7 Santa Monica: Santa Monica DA CA LSANCAJW2MD  508J CENTURYLINK COMMUNICATIONS, LLC 730   2017-01-12   
424-433 8 Santa Monica: Santa Monica DA CA SNMNCAXPXJY  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2017-05-25   
424-433 9 Santa Monica: Santa Monica DA CA SHOKCA02IMD  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2020-04-29   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.