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: SNBUCA02DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-244 A South San Francisco CA 9740 PACIFIC BELL 722      
650-246 A South San Francisco CA 9740 PACIFIC BELL 722      
650-246 1 South San Francisco CA 9740 PACIFIC BELL 722      
650-246 2 South San Francisco CA 9740 PACIFIC BELL 722      
650-246 3 South San Francisco CA 9740 PACIFIC BELL 722      
650-246 4 South San Francisco CA 9740 PACIFIC BELL 722      
650-246 5 South San Francisco CA 9740 PACIFIC BELL 722      
650-246 6 South San Francisco CA 9740 PACIFIC BELL 722      
650-246 7 South San Francisco CA 9740 PACIFIC BELL 722      
650-246 8 South San Francisco CA 9740 PACIFIC BELL 722      
650-266 A South San Francisco CA 9740 PACIFIC BELL 722      
650-583 A South San Francisco CA 9740 PACIFIC BELL 722      
650-588 A South San Francisco CA 9740 PACIFIC BELL 722      
650-589 A South San Francisco CA 9740 PACIFIC BELL 722      
650-827 A South San Francisco CA 9740 PACIFIC BELL 722      
650-827 0 South San Francisco CA 9740 PACIFIC BELL 722      
650-827 1 South San Francisco CA 9740 PACIFIC BELL 722      
650-827 2 South San Francisco CA 9740 PACIFIC BELL 722      
650-827 3 South San Francisco CA 9740 PACIFIC BELL 722      
650-827 4 South San Francisco CA 9740 PACIFIC BELL 722      
650-827 6 South San Francisco CA 9740 PACIFIC BELL 722      
650-827 7 South San Francisco CA 9740 PACIFIC BELL 722      
650-827 8 South San Francisco CA 9740 PACIFIC BELL 722      
650-827 9 South San Francisco CA 9740 PACIFIC BELL 722      
650-871 A South San Francisco CA 9740 PACIFIC BELL 722      
650-872 A South San Francisco CA 9740 PACIFIC BELL 722      
650-872 0 South San Francisco CA 9740 PACIFIC BELL 722      
650-872 1 South San Francisco CA 9740 PACIFIC BELL 722      
650-872 2 South San Francisco CA 9740 PACIFIC BELL 722      
650-872 3 South San Francisco CA 9740 PACIFIC BELL 722      
650-872 4 South San Francisco CA 9740 PACIFIC BELL 722      
650-872 5 South San Francisco CA 9740 PACIFIC BELL 722      
650-872 6 South San Francisco CA 9740 PACIFIC BELL 722      
650-872 7 South San Francisco CA 9740 PACIFIC BELL 722      
650-872 8 South San Francisco CA 9740 PACIFIC BELL 722      
650-873 A South San Francisco CA 9740 PACIFIC BELL 722      
650-952 A South San Francisco CA 9740 PACIFIC BELL 722      

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.