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: 714

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-714 A Morristown TN KNVLTN02DMD  8356 US LEC OF TENNESSEE, INC. 474      
423-714 0 Morristown TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474   2016-08-21   
423-714 1 Morristown TN KNVLTN02DMD  8356 US LEC OF TENNESSEE, INC. 474      
423-714 2 Morristown TN KNVLTN02DMD  8356 US LEC OF TENNESSEE, INC. 474      
423-714 3 Morristown TN KNVLTN02DMD  8356 US LEC OF TENNESSEE, INC. 474      
423-714 4 Morristown TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474   2019-06-16   
423-714 5 Morristown TN KNVLTN02DMD  8356 US LEC OF TENNESSEE, INC. 474      
423-714 6 Morristown TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2009-12-31   
423-714 7 Morristown TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474   2010-11-19   
423-714 8 Morristown TN KNVLTN02DMD  8356 US LEC OF TENNESSEE, INC. 474      
423-714 9 Morristown TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2011-09-05   

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.