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: OKFDWIXADS0

Remotes:

Switch Switch name Switch type
CMPTWIXARS0  CAMPBELLSPORT  RS 
EDENWIXCRS0  EDEN  RS 
LOMRWIXARS6  LOMIRA  RS 
THRSWIXARS4  THERESA  RS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
920-583 A Oakfield WI 0886 FRONTIER NORTH INC. - WI 356      
920-583 1 Oakfield WI 0886 FRONTIER NORTH INC. - WI 356      
920-583 2 Oakfield WI 0886 FRONTIER NORTH INC. - WI 356      
920-583 3 Oakfield WI 0886 FRONTIER NORTH INC. - WI 356      
920-583 4 Oakfield WI 0886 FRONTIER NORTH INC. - WI 356      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.