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: 966

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-966 A Ball Play TN KNVLTNEC0MD  965H FRACTEL, LLC 474      
423-966 1 Ball Play TN   792K CHARTER IP ENABLED SERVICES, LLC 474   2023-06-25   
423-966 2 Ball Play TN   525E ONVOY, LLC - TN 474   2021-04-11   
423-966 5 Ball Play TN   516J TON80 COMMUNICATIONS, LLC 474   2021-07-01   
423-966 6 Ball Play TN   965H FRACTEL, LLC 474   2020-09-12   
423-966 9 Ball Play TN   145J TERRA NOVA TELECOM INC. 474   2025-08-10   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.