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: LSATCA11DS0

Remotes:

Switch Switch name Switch type
MSBHCA11RS2  MOSS BEACH  5ER 
PSCDCA11RS1  PESCADERO  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-559 A Los Altos CA 9740 PACIFIC BELL 722      
650-559 0 Los Altos CA 9740 PACIFIC BELL 722      
650-559 1 Los Altos CA 9740 PACIFIC BELL 722      
650-559 2 Los Altos CA 9740 PACIFIC BELL 722      
650-559 3 Los Altos CA 9740 PACIFIC BELL 722      
650-559 5 Los Altos CA 9740 PACIFIC BELL 722      
650-559 7 Los Altos CA 9740 PACIFIC BELL 722      
650-559 8 Los Altos CA 9740 PACIFIC BELL 722      
650-559 9 Los Altos CA 9740 PACIFIC BELL 722      
650-917 A Los Altos CA 9740 PACIFIC BELL 722      
650-941 A Los Altos CA 9740 PACIFIC BELL 722      
650-947 A Los Altos CA 9740 PACIFIC BELL 722      
650-947 0 Los Altos CA 9740 PACIFIC BELL 722      
650-947 1 Los Altos CA 9740 PACIFIC BELL 722      
650-947 2 Los Altos CA 9740 PACIFIC BELL 722      
650-947 4 Los Altos CA 9740 PACIFIC BELL 722      
650-947 5 Los Altos CA 9740 PACIFIC BELL 722      
650-947 6 Los Altos CA 9740 PACIFIC BELL 722      
650-947 8 Los Altos CA 9740 PACIFIC BELL 722      
650-947 9 Los Altos CA 9740 PACIFIC BELL 722      
650-948 A Los Altos CA 9740 PACIFIC BELL 722      
650-949 A Los Altos CA 9740 PACIFIC BELL 722      

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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