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: SNFCCA12DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
415-202 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-351 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-474 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-600 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-614 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-749 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-771 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-775 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-776 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-833 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-885 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-921 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-922 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-923 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-928 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-929 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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