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: 433

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
940-433 A Boyd TX BOYDTXXARS0  2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-433 0 Boyd TX BOYDTXXARS0  2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-433 1 Boyd TX DCTRTXXATMD  903C ONVOY, LLC - TX 552   2017-06-23   
940-433 2 Boyd TX BOYDTXXARS0  2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-433 3 Boyd TX BOYDTXXARS0  2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-433 4 Boyd TX DCTRTXXATMD  903C ONVOY, LLC - TX 552   2019-10-06   
940-433 5 Boyd TX BOYDTXXARS0  2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-433 6 Boyd TX DCTRTXXATMD  903C ONVOY, LLC - TX 552   2019-10-06   
940-433 7 Boyd TX FTWQTXFH0MD  508J CENTURYLINK COMMUNICATIONS, LLC 552   2014-05-19   
940-433 8 Boyd TX BOYDTXXARS0  2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-433 9 Boyd TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2020-07-15   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.