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: MOBLALAZDS0

Remotes:

Switch Switch name Switch type
MCINALMARS0  MCINTOSH  RSC 
MTVRALMARS0  MOUNT VERNON  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date

Last updated: Sun, 01 Nov 2026 02:11:49 UTC

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