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: MNPKCA11DS0

Remotes:

Switch Switch name Switch type
LAHNCA11RS0  LA HONDA  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-233 A Palo Alto CA 9740 PACIFIC BELL 722      
650-234 A Palo Alto CA 9740 PACIFIC BELL 722      
650-529 A Woodside CA 9740 PACIFIC BELL 722      
650-529 0 Woodside CA 9740 PACIFIC BELL 722      
650-529 1 Woodside CA 9740 PACIFIC BELL 722      
650-529 2 Woodside CA 9740 PACIFIC BELL 722      
650-529 3 Woodside CA 9740 PACIFIC BELL 722      
650-529 8 Woodside CA 9740 PACIFIC BELL 722      
650-529 9 Woodside CA 9740 PACIFIC BELL 722      
650-561 A Palo Alto CA 9740 PACIFIC BELL 722      
650-561 0 Palo Alto CA 9740 PACIFIC BELL 722      
650-561 1 Palo Alto CA 9740 PACIFIC BELL 722      
650-561 9 Palo Alto CA 9740 PACIFIC BELL 722      
650-851 A Woodside CA 9740 PACIFIC BELL 722      
650-854 A Palo Alto CA 9740 PACIFIC BELL 722      
650-926 A Palo Alto CA 9740 PACIFIC BELL 722      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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