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: 675

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-675 A Jasper TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472      
423-675 0 Jasper TN CHTGTN12X2Y  939H COMMIO, LLC 472   2023-10-25   
423-675 1 Jasper TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2021-12-09   
423-675 2 Jasper TN CHTGTN12X2Y  939H COMMIO, LLC 472   2023-09-28   
423-675 3 Jasper TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-07-11   
423-675 4 Jasper TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-07-11   
423-675 5 Jasper TN CHTGTN12X2Y  939H COMMIO, LLC 472   2023-09-28   
423-675 6 Jasper TN CHTGTNNSXTZ  506J TWILIO INTERNATIONAL, INC. 472   2021-08-08   
423-675 7 Jasper TN CHTGTN12X2Y  939H COMMIO, LLC 472   2023-09-28   
423-675 8 Jasper TN CHTGTNNSXMZ  624H ONVOY SPECTRUM, LLC 472   2023-06-17   
423-675 9 Jasper TN CHTGTN12X2Y  939H COMMIO, LLC 472   2023-09-28   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.