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: 583

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-583 A Sullivan Gardens TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956      
423-583 0 Sullivan Gardens TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2018-11-26   
423-583 1 Sullivan Gardens TN JHCYTNXCXAY  073H TELNYX LLC 956   2021-01-23   
423-583 2 Sullivan Gardens TN JHCYTNXCX8Y  939H COMMIO, LLC 956   2022-12-11   
423-583 3 Sullivan Gardens TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-07-10   
423-583 4 Sullivan Gardens TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-07-10   
423-583 5 Sullivan Gardens TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-02-17   
423-583 6 Sullivan Gardens TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-02-17   
423-583 7 Sullivan Gardens TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2022-12-29   
423-583 8 Sullivan Gardens TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-06-06   
423-583 9 Sullivan Gardens TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-06-06   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.