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: OKLDCA03DS5

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
510-837 A Richmond CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
707-835 A Petaluma: Main DA CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-386 A Orinda CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-392 A East Contra Costa CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-635 A Pittsburg CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-658 A Walnut Creek CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-659 A Bishop Ranch CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-693 A Clayton CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.