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: 594

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-594 A Dayton TN CHTGTNMAX9X  7421 AT&T - LOCAL 472      
423-594 0 Dayton TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-04-27   
423-594 1 Dayton TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2016-04-11   
423-594 2 Dayton TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2016-04-11   
423-594 3 Dayton TN CHTGTN12X8X  7278 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 472   2016-10-16   
423-594 4 Dayton TN   4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2019-08-11   
423-594 5 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2019-08-18   
423-594 6 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2019-08-18   
423-594 8 Dayton TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-04-27   
423-594 9 Dayton TN CHTGTNMAX9X  7421 AT&T - LOCAL 472   2009-11-19   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.