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.

Switch: LSANCAGJDS4

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
323-556 6 Los Angeles: DA 13 CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
424-207 2 Inglewood CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730   2007-03-10   

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

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