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: PTLVTXXAIMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
361-284 1 Vanderbilt TX 903C ONVOY, LLC - TX 564   2023-09-18   
361-286 0 Tivoli TX 903C ONVOY, LLC - TX 564   2023-09-18   
361-303 A Premont TX 903C ONVOY, LLC - TX 564      
361-303 9 Premont TX 903C ONVOY, LLC - TX 564   2022-12-15   
361-403 1 Palacios TX 903C ONVOY, LLC - TX 564   2024-01-11   
361-408 1 Port O'Connor TX 903C ONVOY, LLC - TX 564   2024-01-11   
361-553 0 Port Lavaca TX 903C ONVOY, LLC - TX 564   2023-09-11   
361-901 0 Port Lavaca TX 903C ONVOY, LLC - TX 564   2024-01-11   

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

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