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: 606

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-606 A Englewood TN KNVLTNMAYHX  318J COMCAST IP PHONE, LLC 474      
423-606 0 Englewood TN KNVLTNMAYHX  318J COMCAST IP PHONE, LLC 474   2007-04-12   
423-606 1 Englewood TN MRTWTN281MD  792K CHARTER IP ENABLED SERVICES, LLC 474   2023-04-02   
423-606 6 Englewood TN KNVLTNMA54Z  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 474   2020-06-11   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.