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: 250

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-250 A Cleveland TN CHTGTNNSXGZ  204G TWIN LAKES COMMUNICATIONS, INC. - TN 472      
423-250 0 Cleveland TN CHTGTNNSXGZ  204G TWIN LAKES COMMUNICATIONS, INC. - TN 472   2017-06-24   
423-250 1 Cleveland TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2017-07-07   
423-250 2 Cleveland TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2018-06-11   
423-250 3 Cleveland TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2018-10-22   
423-250 4 Cleveland TN CHTGTNNSX1X  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2021-05-30   
423-250 5 Cleveland TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2018-10-22   
423-250 6 Cleveland TN CHTGTNNSX1X  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2021-05-30   
423-250 7 Cleveland TN CHTGTNNSXJZ  073H TELNYX LLC 472   2021-01-17   
423-250 8 Cleveland TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-04-26   
423-250 9 Cleveland TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-04-26   

Last updated: Fri, 23 Jul 2021 12:43:22 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.