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: SNFCCA21DS0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
415-975 6 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-975 7 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-975 8 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-975 9 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-977 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 0 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 1 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 2 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 3 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 5 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 6 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 7 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 8 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-978 9 San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-979 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      
415-995 A San Francisco: Central DA CA 9740 PACIFIC BELL 722      

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Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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