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: SNANTXTSDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
210-239 A San Antonio TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566      
210-239 4 San Antonio TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2007-01-20   
210-529 A San Antonio TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566      
210-529 3 San Antonio TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2013-10-11   
210-529 9 San Antonio TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2013-10-11   
830-239 6 Runge TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2012-02-18   
830-254 6 Karnes City-Falls City TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2012-02-18   
830-341 4 Pleasanton TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2021-02-28   
830-400 6 Kenedy TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2012-02-18   
830-572 4 Gillett TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2012-02-18   
830-666 A Seguin TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566      
830-666 6 Seguin TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2017-12-17   
830-851 4 Devine TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2016-05-18   
830-872 4 Eagle Pass TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2009-02-02   
956-284 4 Laredo TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2009-01-24   
956-999 A Laredo TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566      
956-999 7 Laredo TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2013-07-06   
956-999 9 Laredo TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 566   2013-07-06   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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