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: 734

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-734 A Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 0 Rogersville TN   525E ONVOY, LLC - TN 474   2021-07-02   
423-734 1 Rogersville TN   525E ONVOY, LLC - TN 474   2021-07-02   
423-734 2 Rogersville TN   5562 METROPCS, INC. 474   2021-05-07   
423-734 3 Rogersville TN   525E ONVOY, LLC - TN 474   2020-03-12   
423-734 4 Rogersville TN   525E ONVOY, LLC - TN 474   2020-03-12   
423-734 5 Rogersville TN   525E ONVOY, LLC - TN 474   2021-03-12   
423-734 6 Rogersville TN   525E ONVOY, LLC - TN 474   2021-03-12   
423-734 7 Rogersville TN   525E ONVOY, LLC - TN 474   2021-03-12   
423-734 8 Rogersville TN   525E ONVOY, LLC - TN 474   2021-03-12   
423-734 9 Rogersville TN   525E ONVOY, LLC - TN 474   2021-07-02   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.