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: 940 [Rate centres in NPA 940] [Dial plan for NPA 940]

NXX: 239

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
940-239 A Denton TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
940-239 0 Denton TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
940-239 1 Denton TX   939H COMMIO, LLC 552   2021-09-18   
940-239 2 Denton TX   939H COMMIO, LLC 552   2021-09-18   
940-239 3 Denton TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2005-12-31   
940-239 4 Denton TX   6529 T-MOBILE USA, INC. 552   2024-11-21   
940-239 5 Denton TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
940-239 6 Denton TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
940-239 7 Denton TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
940-239 8 Denton TX   004F BANDWIDTH.COM CLEC, LLC - TX 552   2022-10-15   
940-239 9 Denton TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.