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: OKLDCA03XOY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
408-300 A San Jose: South DA CA 318J COMCAST IP PHONE LLC 722      
408-440 A San Jose: South DA CA 318J COMCAST IP PHONE LLC 722      
408-498 A Sunnyvale CA 318J COMCAST IP PHONE LLC 722      
408-564 A San Jose: West DA CA 318J COMCAST IP PHONE LLC 722      
408-770 A San Jose: North DA CA 318J COMCAST IP PHONE LLC 722      
408-816 A San Jose: West DA CA 318J COMCAST IP PHONE LLC 722      
408-899 A San Jose: West DA CA 318J COMCAST IP PHONE LLC 722      
415-742 A San Francisco: Montrose-Evergreen DA CA 318J COMCAST IP PHONE LLC 722      
415-888 A Mill Valley CA 318J COMCAST IP PHONE LLC 722      
415-891 A Corte Madera CA 318J COMCAST IP PHONE LLC 722      
510-260 A Richmond CA 318J COMCAST IP PHONE LLC 722      
510-397 A Hayward CA 318J COMCAST IP PHONE LLC 722      
510-560 A Oakland: Trinidad DA CA 318J COMCAST IP PHONE LLC 722      
510-573 A Fremont-Newark: Oliver DA CA 318J COMCAST IP PHONE LLC 722      
510-586 A Hayward CA 318J COMCAST IP PHONE LLC 722      
510-603 A Oakland: Fruitvale DA CA 318J COMCAST IP PHONE LLC 722      
510-778 A Richmond CA 318J COMCAST IP PHONE LLC 722      
510-833 A Oakland: Berkeley DA CA 318J COMCAST IP PHONE LLC 722      
510-878 A Oakland: Trinidad DA CA 318J COMCAST IP PHONE LLC 722      
510-894 A Fremont-Newark: Main DA CA 318J COMCAST IP PHONE LLC 722      
510-941 A Fremont-Newark: Greenleaf DA CA 318J COMCAST IP PHONE LLC 722      
510-972 A Fremont-Newark: Greenleaf DA CA 318J COMCAST IP PHONE LLC 722      
650-521 A Palo Alto CA 318J COMCAST IP PHONE LLC 722      
650-898 A Pacifica CA 318J COMCAST IP PHONE LLC 722      
650-946 A Los Altos CA 318J COMCAST IP PHONE LLC 722      
669-230 A San Jose: West DA CA 318J COMCAST IP PHONE LLC 722      
669-264 A Sunnyvale CA 318J COMCAST IP PHONE LLC 722      
669-267 A Saratoga CA 318J COMCAST IP PHONE LLC 722      
669-275 A San Jose: South DA CA 318J COMCAST IP PHONE LLC 722      
707-282 A Kenwood CA 318J COMCAST IP PHONE LLC 722      
707-699 A Napa CA 318J COMCAST IP PHONE LLC 722      
707-731 A Vallejo CA 318J COMCAST IP PHONE LLC 722      
707-852 A Santa Rosa CA 318J COMCAST IP PHONE LLC 722   2021-02-08   
925-238 A Antioch CA 318J COMCAST IP PHONE LLC 722      
925-278 A Walnut Creek CA 318J COMCAST IP PHONE LLC 722      
925-292 A Livermore CA 318J COMCAST IP PHONE LLC 722      
925-350 A Antioch CA 318J COMCAST IP PHONE LLC 722      
925-399 A Pleasanton CA 318J COMCAST IP PHONE LLC 722      
925-430 A Walnut Creek CA 318J COMCAST IP PHONE LLC 722      
925-433 A Walnut Creek CA 318J COMCAST IP PHONE LLC 722      
925-483 A Concord CA 318J COMCAST IP PHONE LLC 722      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.