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: 310 [Rate centres in NPA 310] [Dial plan for NPA 310]

NXX: 357

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-357 A Torrance CA LSANCA03DS7  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
310-357 0 Torrance CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2004-09-09   
310-357 1 Torrance CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2004-09-09   
310-357 2 Torrance CA LSANCA03DS7  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
310-357 3 Torrance CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2004-02-04   
310-357 4 Torrance CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-01-18   
310-357 5 Torrance CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2004-02-04   
310-357 6 Torrance CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2004-02-04   
310-357 7 Torrance CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2003-09-21   
310-357 8 Torrance CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2004-02-04   
310-357 9 Torrance CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-01-18   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.