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: WDLDCA11DS0

Remotes:

Switch Switch name Switch type
DIXNCA11RS0  DIXON  5BR 
DNGNCA12RS0  DUNNIGAN  5ER 
ESPRCA11RS0  ESPARTO  5ER 
WNTRCA11RS0  WINTERS  5BR 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-406 A Woodland CA 9740 PACIFIC BELL 726      
530-661 A Woodland CA 9740 PACIFIC BELL 726      
530-662 A Woodland CA 9740 PACIFIC BELL 726      
530-666 A Woodland CA 9740 PACIFIC BELL 726      
530-668 A Woodland CA 9740 PACIFIC BELL 726      
530-669 A Woodland CA 9740 PACIFIC BELL 726      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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