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: HURNSDCODS0

Remotes:

Switch Switch name Switch type
CAVRSDCORS1  CAVOUR  AXR 
DESMSDCORS1  DESMET  AXR 
IRQSSDCORS1  IROQUOIS  AXR 
LKPRSDCORS1  LAKE PRESTON  AXR 
MLLRSDCORS1  MILLER  AXR 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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