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: 857

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-857 A Santa Monica: Santa Monica DA CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
310-857 0 Santa Monica: Santa Monica DA CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730   2012-07-30   
310-857 1 Santa Monica: Santa Monica DA CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
310-857 2 Santa Monica: Santa Monica DA CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2005-11-18   
310-857 3 Santa Monica: Santa Monica DA CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
310-857 4 Santa Monica: Santa Monica DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2011-08-01   
310-857 5 Santa Monica: Santa Monica DA CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
310-857 6 Santa Monica: Santa Monica DA CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-03-10   
310-857 7 Santa Monica: Santa Monica DA CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-03-10   
310-857 8 Santa Monica: Santa Monica DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2006-09-13   
310-857 9 Santa Monica: Santa Monica DA CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2011-07-25   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.