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: PHRRTXPHDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
956-348 A Edinburg TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568      
956-348 6 Edinburg TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2017-01-05   
956-666 A Pharr TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568      
956-666 4 Pharr TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2016-05-29   
956-666 6 Pharr TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2016-05-29   
956-732 A McAllen TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568      
956-732 5 McAllen TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2016-12-29   
956-747 A Brownsville TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568      
956-747 4 Brownsville TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2016-06-22   
956-747 7 Brownsville TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2016-06-22   
956-766 A Mission TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568      
956-766 3 Mission TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2017-01-14   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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