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.

Mill Gap, VA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
540-499 A MLGPVAXARS0  0237 HIGHLAND TEL. COOP. 244      
540-549 A RONKVALKXJY  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 244      
540-549 2 RONKVALKXJY  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 244   2018-03-19   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.