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: 556

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-556 A Soddy Daisy TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472      
423-556 0 Soddy Daisy TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 472   2018-10-29   
423-556 1 Soddy Daisy TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-06-23   
423-556 2 Soddy Daisy TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-06-23   
423-556 3 Soddy Daisy TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-10-13   
423-556 4 Soddy Daisy TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-10-13   
423-556 5 Soddy Daisy TN CHTITNCDDS0  4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2020-02-27   
423-556 6 Soddy Daisy TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2020-03-28   
423-556 7 Soddy Daisy TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2020-03-28   
423-556 8 Soddy Daisy TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-04-12   
423-556 9 Soddy Daisy TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-04-12   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.