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: 602

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-602 A Lomita CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
310-602 0 Lomita CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
310-602 1 Lomita CA   145J TERRA NOVA TELECOM INC. 730   2022-10-03   
310-602 2 Lomita CA GRDNCA02DS3  7421 AT&T - LOCAL 730   2002-10-27   
310-602 3 Lomita CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2012-01-12   
310-602 4 Lomita CA LSANCA03DS7  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2002-04-12   
310-602 5 Lomita CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2000-04-11   
310-602 6 Lomita CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2003-02-11   
310-602 7 Lomita CA ANHMCAHLDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2003-05-04   
310-602 8 Lomita CA IRVECAJTDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730   2000-04-10   
310-602 9 Lomita CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2004-11-12   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.