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: AUSTTXGRDS3

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
512-822 A Austin TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      
737-222 A Austin TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      
737-333 A Austin TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      
737-444 A Georgetown TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      
737-666 A Elgin TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      
737-777 A Leander TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      
737-888 A Taylor TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      
737-999 A Buda TX 319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      

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

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