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: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-203 A Lomita CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730      
424-203 0 Lomita CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2007-11-19   
424-203 1 Lomita CA ANHMCANG2MD  4733 PAETEC COMMUNICATIONS, INC. - CA 730   2007-07-26   
424-203 2 Lomita CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2007-01-25   
424-203 3 Lomita CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2007-03-02   
424-203 4 Lomita CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2008-03-26   
424-203 5 Lomita CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2007-03-04   
424-203 6 Lomita CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2012-12-30   
424-203 7 Lomita CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2007-03-10   
424-203 8 Lomita CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2007-03-10   
424-203 9 Lomita CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2007-03-06   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.