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: AUSTTXGR52Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
512-401 0 Austin TX 145J TERRA NOVA TELECOM INC. 558   2024-09-14   
512-678 1 Bastrop TX 145J TERRA NOVA TELECOM INC. 558   2024-05-26   
737-233 2 Elgin TX 145J TERRA NOVA TELECOM INC. 558   2024-08-14   
737-294 4 Bastrop TX 145J TERRA NOVA TELECOM INC. 558   2024-12-30   
737-353 A Buda TX 145J TERRA NOVA TELECOM INC. 558      
737-386 6 Lampasas TX 145J TERRA NOVA TELECOM INC. 558   2024-11-07   
737-900 A Austin TX 145J TERRA NOVA TELECOM INC. 558      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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