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: 355

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-355 A Beverly Hills CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
424-355 0 Beverly Hills CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2014-11-27   
424-355 1 Beverly Hills CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-11-25   
424-355 2 Beverly Hills CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2014-11-24   
424-355 3 Beverly Hills CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2015-07-14   
424-355 4 Beverly Hills CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2015-07-14   
424-355 5 Beverly Hills CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2015-07-22   
424-355 6 Beverly Hills CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-11-25   
424-355 7 Beverly Hills CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-11-25   
424-355 8 Beverly Hills CA LSANCA03LMD  156J RCLEC, INC. 730   2015-07-21   
424-355 9 Beverly Hills CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-11-25   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.