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: SNJSCAYBDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
415-432 2 San Francisco: Central DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
510-746 3 Oakland: Trinidad DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
510-746 9 Oakland: Trinidad DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      
707-207 7 Fairfield-Suisun CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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