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.

Ralston, AB

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
403-544 A RLTNAB04RS0  8084 TELUS COMMUNICATIONS, INC. 888 808403    
403-595 A RLTNABAI0MD  497E SHAW TELECOM INC. - BC 888 808403    
825-702 A MDHTAB026MD  081E DISTRIBUTEL COMMUNICATIONS LIMITED 888 808403    

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.