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: 423 [Rate centres in NPA 423] [Dial plan for NPA 423]

NXX: 859

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-859 A Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-859 0 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2024-02-05   
423-859 2 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2023-08-04   
423-859 3 Rogersville TN   525E ONVOY, LLC - TN 474   2025-06-19   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.