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: 939

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-939 A Jasper TN CHTGTNKF0MD  4622 DELTACOM, INC. - TN 472   2023-02-23   
423-939 0 Jasper TN CLEVTNDL0MD  704C CHARTER FIBERLINK-TENNESSEE, LLC - TN 472   2006-09-11   
423-939 1 Jasper TN CLEVTNDL0MD  704C CHARTER FIBERLINK-TENNESSEE, LLC - TN 472   2013-09-20   
423-939 2 Jasper TN CHTGTNKF0MD  4622 DELTACOM, INC. - TN 472   2008-08-24   
423-939 3 Jasper TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-03-15   
423-939 4 Jasper TN CHTGTNMAXVX  516C AT&T CORP. 472   2010-03-19   
423-939 5 Jasper TN CHTGTNNSXEY  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472   2009-05-25   
423-939 6 Jasper TN CHTITNCDDS0  4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2020-02-24   
423-939 7 Jasper TN CHTGTNKF0MD  8356 US LEC OF TENNESSEE, INC. 472   2013-07-15   
423-939 8 Jasper TN CHTGTNNSX8Z  508J CENTURYLINK COMMUNICATIONS, LLC 472   2014-05-06   
423-939 9 Jasper TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2008-11-28   

Last updated: Sat, 26 Aug 2023 16:14:14 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.