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: SNMTCA11DS0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-525 A San Mateo CA 9740 PACIFIC BELL 722      
650-525 0 San Mateo CA 9740 PACIFIC BELL 722      
650-525 1 San Mateo CA 9740 PACIFIC BELL 722      
650-525 3 San Mateo CA 9740 PACIFIC BELL 722      
650-525 5 San Mateo CA 9740 PACIFIC BELL 722      
650-525 7 San Mateo CA 9740 PACIFIC BELL 722      
650-525 8 San Mateo CA 9740 PACIFIC BELL 722      
650-525 9 San Mateo CA 9740 PACIFIC BELL 722      
650-554 A San Mateo CA 9740 PACIFIC BELL 722      
650-554 2 San Mateo CA 9740 PACIFIC BELL 722      
650-554 3 San Mateo CA 9740 PACIFIC BELL 722      
650-554 4 San Mateo CA 9740 PACIFIC BELL 722      
650-554 5 San Mateo CA 9740 PACIFIC BELL 722      
650-554 6 San Mateo CA 9740 PACIFIC BELL 722      
650-554 7 San Mateo CA 9740 PACIFIC BELL 722      
650-638 A San Mateo CA 9740 PACIFIC BELL 722      
650-638 0 San Mateo CA 9740 PACIFIC BELL 722      
650-638 1 San Mateo CA 9740 PACIFIC BELL 722      
650-638 2 San Mateo CA 9740 PACIFIC BELL 722      
650-638 3 San Mateo CA 9740 PACIFIC BELL 722      
650-638 4 San Mateo CA 9740 PACIFIC BELL 722      
650-638 5 San Mateo CA 9740 PACIFIC BELL 722      
650-638 6 San Mateo CA 9740 PACIFIC BELL 722      
650-638 7 San Mateo CA 9740 PACIFIC BELL 722      
650-638 9 San Mateo CA 9740 PACIFIC BELL 722      
650-655 A San Mateo CA 9740 PACIFIC BELL 722      

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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