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: 589

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-589 A Georgetown TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-589 0 Georgetown TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-06-23   
423-589 1 Georgetown TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-06-23   
423-589 2 Georgetown TN CHTGTNNSXJZ  073H TELNYX LLC 472   2021-01-23   
423-589 3 Georgetown TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2022-12-23   
423-589 4 Georgetown TN CHTITNCDDS0  4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2020-02-24   
423-589 5 Georgetown TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-03-15   
423-589 6 Georgetown TN CHTGTNNSXMZ  624H ONVOY SPECTRUM, LLC 472   2023-06-17   
423-589 7 Georgetown TN CHTGTNNSXTZ  506J TWILIO INTERNATIONAL, INC. 472   2021-08-08   
423-589 8 Georgetown TN CHTGTNNSXGZ  204G TWIN LAKES COMMUNICATIONS, INC. - TN 472   2020-11-23   
423-589 9 Georgetown TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2019-06-03   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.