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      
650-634 0 South San Francisco CA 9740 PACIFIC BELL 722      
650-634 1 South San Francisco CA 9740 PACIFIC BELL 722      
650-634 2 South San Francisco CA 9740 PACIFIC BELL 722      
650-634 3 South San Francisco CA 9740 PACIFIC BELL 722      
650-634 4 South San Francisco CA 9740 PACIFIC BELL 722      
650-634 5 South San Francisco CA 9740 PACIFIC BELL 722      
650-634 6 South San Francisco CA 9740 PACIFIC BELL 722      
650-634 7 South San Francisco CA 9740 PACIFIC BELL 722      
650-634 9 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      
650-737 0 South San Francisco CA 9740 PACIFIC BELL 722      
650-737 1 South San Francisco CA 9740 PACIFIC BELL 722      
650-737 3 South San Francisco CA 9740 PACIFIC BELL 722      
650-737 5 South San Francisco CA 9740 PACIFIC BELL 722      
650-737 6 South San Francisco CA 9740 PACIFIC BELL 722      
650-737 7 South San Francisco CA 9740 PACIFIC BELL 722      
650-737 8 South San Francisco CA 9740 PACIFIC BELL 722      
650-737 9 South San Francisco CA 9740 PACIFIC BELL 722      
650-741 A South San Francisco CA 9740 PACIFIC BELL 722      
650-741 2 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      
650-761 8 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      
650-808 1 South San Francisco CA 9740 PACIFIC BELL 722      
650-808 2 South San Francisco CA 9740 PACIFIC BELL 722      
650-808 3 South San Francisco CA 9740 PACIFIC BELL 722      
650-808 4 South San Francisco CA 9740 PACIFIC BELL 722      
650-808 6 South San Francisco CA 9740 PACIFIC BELL 722      
650-808 8 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      
650-837 2 South San Francisco CA 9740 PACIFIC BELL 722      
650-837 4 South San Francisco CA 9740 PACIFIC BELL 722      
650-837 5 South San Francisco CA 9740 PACIFIC BELL 722      
650-837 7 South San Francisco CA 9740 PACIFIC BELL 722      
650-837 8 South San Francisco CA 9740 PACIFIC BELL 722      
650-837 9 South San Francisco CA 9740 PACIFIC BELL 722      
650-866 A South San Francisco CA 9740 PACIFIC BELL 722      
650-866 2 South San Francisco CA 9740 PACIFIC BELL 722      
650-866 3 South San Francisco CA 9740 PACIFIC BELL 722      
650-866 4 South San Francisco CA 9740 PACIFIC BELL 722      
650-866 6 South San Francisco CA 9740 PACIFIC BELL 722      
650-866 7 South San Francisco CA 9740 PACIFIC BELL 722      
650-869 A South San Francisco CA 9740 PACIFIC BELL 722      
650-869 0 South San Francisco CA 9740 PACIFIC BELL 722      
650-869 1 South San Francisco CA 9740 PACIFIC BELL 722      
650-869 2 South San Francisco CA 9740 PACIFIC BELL 722      
650-869 3 South San Francisco CA 9740 PACIFIC BELL 722      
650-869 4 South San Francisco CA 9740 PACIFIC BELL 722      
650-869 5 South San Francisco CA 9740 PACIFIC BELL 722      
650-869 6 South San Francisco CA 9740 PACIFIC BELL 722      
650-869 7 South San Francisco CA 9740 PACIFIC BELL 722      
650-869 8 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      
650-877 0 South San Francisco CA 9740 PACIFIC BELL 722      
650-877 1 South San Francisco CA 9740 PACIFIC BELL 722      
650-877 3 South San Francisco CA 9740 PACIFIC BELL 722      
650-877 4 South San Francisco CA 9740 PACIFIC BELL 722      
650-877 5 South San Francisco CA 9740 PACIFIC BELL 722      
650-877 6 South San Francisco CA 9740 PACIFIC BELL 722      
650-877 7 South San Francisco CA 9740 PACIFIC BELL 722      
650-877 8 South San Francisco CA 9740 PACIFIC BELL 722      
650-877 9 South San Francisco CA 9740 PACIFIC BELL 722      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.