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.

Switch: DLLATX58DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
214-888 A Dallas TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
214-888 0 Dallas TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2004-07-01   
214-888 1 Dallas TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2004-07-01   
214-888 5 Dallas TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2004-07-01   
254-888 A Kopperl TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
254-888 8 Kopperl TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2015-08-01   
469-244 A Dallas TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
469-270 A Allen TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
469-270 4 Allen TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2012-01-20   
469-275 5 Grand Prairie TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2012-07-17   
469-440 A Plano TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
469-440 4 Plano TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2011-11-12   
469-444 4 Lewisville TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2013-11-17   
469-452 5 McKinney TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2008-09-12   
469-554 A Dallas TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
469-554 4 Dallas TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2005-06-17   
469-565 4 Irving TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2015-05-30   
469-698 5 Rockwall EACS TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2008-03-22   
469-900 4 Carrollton TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2015-06-05   
682-800 A Arlington TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
682-800 0 Arlington TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2017-07-07   
682-800 8 Arlington TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2017-07-07   
817-873 4 Grapevine TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2015-02-06   
817-885 4 Fort Worth TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2008-10-20   
903-401 4 Paris TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2010-08-13   
903-462 5 Denison TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2010-08-13   
903-820 4 Sherman TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2015-02-06   
903-999 A Martins Mill TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
903-999 9 Martins Mill TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2016-05-15   
940-777 A Sanger TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
940-777 7 Sanger TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2015-11-20   
940-999 A Denton TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552      
940-999 9 Denton TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2014-07-12   
972-292 4 Frisco EACS TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 552   2008-09-12   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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