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.
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
408-462 A Sunnyvale CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
408-465 A Morgan Hill CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
408-603 A Campbell CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
408-634 A San Martin CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
408-660 A San Jose: West DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
408-702 A Sunnyvale CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
408-833 A San Jose: South DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
408-834 A San Jose: North DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
408-843 A Gilroy CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-324 A Sausalito CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-325 A San Francisco: Juniper DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-418 A San Francisco: Montrose-Evergreen DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-489 A San Francisco: Central DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-493 A Novato CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-496 A Corte Madera CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-510 A San Francisco: Central DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-524 A San Rafael CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-527 A San Francisco: Central DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-549 A San Francisco: Central DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-691 A Belvedere CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-787 A Point Reyes CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-872 A San Francisco: Central DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-997 A Nicasio CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-227 A Oakland: Alameda DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-240 A Fremont-Newark: Greenleaf DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-253 A Richmond CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-361 A Hayward CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-379 A Oakland: Main-Piedmont DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-467 A Oakland: Fruitvale DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-725 A Oakland: Berkeley DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-943 A Fremont-Newark: Main DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
510-969 A Oakland: Trinidad DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-204 A Millbrae CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-276 A Half Moon Bay CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-297 A Pescadero CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-382 A Palo Alto CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-391 A Palo Alto CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-392 A South San Francisco CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-393 A San Mateo CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-394 A San Carlos-Belmont CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-395 A Redwood City CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
707-293 A Santa Rosa CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
707-375 A Rio Vista CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
707-562 A Vallejo CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
707-564 A Vacaville CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
831-703 A Boulder Creek CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
831-706 A Santa Cruz CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
831-707 A Watsonville CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-302 A Bishop Ranch CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-303 A Antioch CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-305 A Concord CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-307 A Dublin-San Ramon CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-308 A East Contra Costa CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-309 A Danville CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-310 A Lafayette CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-315 A Livermore CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-318 A Pittsburg CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-379 A Pleasanton CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-660 A Pleasanton CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-843 A Bishop Ranch CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
925-953 A Walnut Creek CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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