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: TXRKTXXANMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
430-230 A Avery TX 903C ONVOY, LLC - TX 554      
430-254 A Redwater TX 903C ONVOY, LLC - TX 554      
430-543 A Simms TX 903C ONVOY, LLC - TX 554      
430-610 A New Boston TX 903C ONVOY, LLC - TX 554      
430-697 A Annona TX 903C ONVOY, LLC - TX 554      
903-260 A Texarkana TX 903C ONVOY, LLC - TX 554      

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

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