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.
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Switch: MDSTCA05DS0

Remotes:

Switch Switch name Switch type
ESCLCA11RS0  ESCALON  5BR 
RVRBCA11RS0  RIVERBANK  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
209-551 A Modesto CA 9740 PACIFIC BELL 738      
209-552 A Modesto CA 9740 PACIFIC BELL 738      

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

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