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: SNBUCA02DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-225 A South San Francisco CA 9740 PACIFIC BELL 722      
650-467 A South San Francisco CA 9740 PACIFIC BELL 722      
650-553 A South San Francisco CA 9740 PACIFIC BELL 722      
650-615 A South San Francisco CA 9740 PACIFIC BELL 722      
650-616 A South San Francisco CA 9740 PACIFIC BELL 722      
650-624 A South San Francisco CA 9740 PACIFIC BELL 722      
650-634 A South San Francisco CA 9740 PACIFIC BELL 722      
650-635 A South San Francisco CA 9740 PACIFIC BELL 722      
650-737 A South San Francisco CA 9740 PACIFIC BELL 722      
650-741 A South San Francisco CA 9740 PACIFIC BELL 722      
650-742 A South San Francisco CA 9740 PACIFIC BELL 722      
650-761 A San Francisco: Juniper DA CA 9740 PACIFIC BELL 722      
650-794 A South San Francisco CA 9740 PACIFIC BELL 722      
650-808 A South San Francisco CA 9740 PACIFIC BELL 722      
650-829 A South San Francisco CA 9740 PACIFIC BELL 722      
650-837 A South San Francisco CA 9740 PACIFIC BELL 722      
650-866 A South San Francisco CA 9740 PACIFIC BELL 722      
650-869 A South San Francisco CA 9740 PACIFIC BELL 722      
650-874 A South San Francisco CA 9740 PACIFIC BELL 722      
650-875 A South San Francisco CA 9740 PACIFIC BELL 722      
650-876 A South San Francisco CA 9740 PACIFIC BELL 722      
650-877 A South San Francisco CA 9740 PACIFIC BELL 722      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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