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: 475

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-475 A Torrance CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
424-475 0 Torrance CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-05-22   
424-475 1 Torrance CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-05-22   
424-475 2 Torrance CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-05-22   
424-475 3 Torrance CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-05-22   
424-475 4 Torrance CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2022-11-21   
424-475 5 Torrance CA   026K BARR TELL USA, LLC 730   2022-06-08   
424-475 6 Torrance CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2022-06-19   
424-475 7 Torrance CA LSANCAJWJMD  516J TON80 COMMUNICATIONS, LLC 730   2022-02-12   
424-475 8 Torrance CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2022-02-12   
424-475 9 Torrance CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-02-11   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.