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: DINBCA01DS0

Remotes:

Switch Switch name Switch type
DLRYCA11RS2  DEL REY  RSC 
ORCVCA11RS0  ORANGE COVE  RSC 
ORSICA11RS3  OROSI  RSC 
PRLRCA11RS0  PARLIER  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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