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: YREKCA11DS1

Remotes:

Switch Switch name Switch type
GRNDCA13RS1  GRENADA  5BR 
GZLLCA11RS1  GAZELLE  5BR 
HRBKCA11RS0  HORNBROOK  5BR 
MTAGCA11RS0  MONTAGUE  5BR 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-841 A Yreka CA 9740 PACIFIC BELL 724      
530-842 A Yreka CA 9740 PACIFIC BELL 724      

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

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