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: UNTYOR03DS0

Remotes:

Switch Switch name Switch type
BATSORXARS0  BATES  RLC 
CNDNORXBRS0    E30 
DUFUORXARS0    E30 
DYVLORXXRS0  DAYVILLE  1RC 
HELXORXARS0    RS 
HLWYORXBRS0    E30 
MTVRORXXRS0    RS 
PRCYORXARS0  PRAIRIE CITY  RLC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
541-446 A Hereford-Unity OR 2389 OREGON TEL. CORP. 672      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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