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: OKLDCAUNDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
408-826 A San Jose: South DA CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
510-313 A Hercules-Rodeo CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
510-350 A Oakland: Main-Piedmont DA CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
510-394 A Oakland: Trinidad DA CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
510-395 A Oakland: Fruitvale DA CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
510-449 A Fremont-Newark: Main DA CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
510-457 A Oakland: Main-Piedmont DA CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
707-395 A Healdsburg CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
707-604 A Guerneville CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
707-620 A Windsor CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
707-658 A Petaluma: Main DA CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
707-814 A Geyserville CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
707-820 A Forestville CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
707-992 A Petaluma: Swift DA CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-208 A Danville CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-271 A Pleasanton CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-361 A Dublin-San Ramon CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-385 A Lafayette CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-387 A Martinez CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-388 A Moraga CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-425 A Pleasanton CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-493 A Livermore CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      
925-568 A Sunol CA 7145 TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO 722      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.