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: 380

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-380 A Cleveland TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472      
423-380 0 Cleveland TN   525E ONVOY, LLC - TN 472   2018-01-20   
423-380 1 Cleveland TN   525E ONVOY, LLC - TN 472   2018-01-20   
423-380 2 Cleveland TN   525E ONVOY, LLC - TN 472   2021-04-11   
423-380 3 Cleveland TN   525E ONVOY, LLC - TN 472   2021-04-11   
423-380 4 Cleveland TN   939H COMMIO, LLC 472   2022-11-21   
423-380 5 Cleveland TN   525E ONVOY, LLC - TN 472   2021-07-11   
423-380 6 Cleveland TN   114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472   2019-12-10   
423-380 7 Cleveland TN   525E ONVOY, LLC - TN 472   2021-07-11   
423-380 8 Cleveland TN   124F BANDWIDTH.COM CLEC, LLC - TN 472   2010-02-25   
423-380 9 Cleveland TN   124F BANDWIDTH.COM CLEC, LLC - TN 472   2010-06-19   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.