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: CRTNOHXADS0

Remotes:

Switch Switch name Switch type
DLRYOHXARS0  DELLROY  GTR 
HRSPOHXARS0  HARLEM SPRINGS  GTR 
MCTWOHXARS0  MECHANICSTOWN  GTR 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
330-627 A Carrollton OH 0615 FRONTIER NORTH, INC. - OH 325      

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

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