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: 276 [Rate centres in NPA 276] [Dial plan for NPA 276]

NXX: 309

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
276-309 A Norton VA RONKVALKX1Z  138E ONVOY, LLC - VA 244      
276-309 0 Norton VA   939H COMMIO, LLC 244   2024-02-09   
276-309 1 Norton VA   939H COMMIO, LLC 244   2024-02-09   
276-309 3 Norton VA   138E ONVOY, LLC - VA 244   2023-10-13   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.