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.

NPA: 587 [Rate centres in NPA 587] [Dial plan for NPA 587]

NXX: 770

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
587-770 A Medicine Hat AB MDHTAB026MD  081E DISTRIBUTEL COMMUNICATIONS LIMITED 888 808403    

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.