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: 669

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-669 A Benton TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472      
423-669 2 Benton TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2023-10-14   
423-669 9 Benton TN   145J TERRA NOVA TELECOM INC. 472   2025-11-22   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.