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: SNJSCAYBDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
408-641 A San Jose: West DA CA 7453 U.S. TELEPACIFIC CORP. - CA 722      
415-266 A San Francisco: Central DA CA 7453 U.S. TELEPACIFIC CORP. - CA 722      
415-562 A San Francisco: Juniper DA CA 7453 U.S. TELEPACIFIC CORP. - CA 722      
510-300 A Hayward CA 7453 U.S. TELEPACIFIC CORP. - CA 722      
650-409 A Millbrae CA 7453 U.S. TELEPACIFIC CORP. - CA 722      
650-517 A San Carlos-Belmont CA 7453 U.S. TELEPACIFIC CORP. - CA 722      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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