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: 567

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-567 A Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-567 0 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2009-01-17   
423-567 1 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2010-06-19   
423-567 2 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2009-11-06   
423-567 3 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2010-09-25   
423-567 4 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2011-02-21   
423-567 5 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2011-04-08   
423-567 6 Dayton TN CHTGTNMAXVX  516C AT&T CORP. 472   2010-03-19   
423-567 7 Dayton TN CHTGTNNSXEY  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472   2013-03-01   
423-567 8 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2016-08-22   
423-567 9 Dayton TN CHTGTNNSXJZ  073H TELNYX LLC 472   2021-01-23   

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.