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: DCSNTXXAJMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
281-603 A Kemah TX 903C ONVOY, LLC - TX 560      
346-358 A League City TX 903C ONVOY, LLC - TX 560      
346-523 A Kemah TX 903C ONVOY, LLC - TX 560      
346-676 A Kemah TX 903C ONVOY, LLC - TX 560      
346-696 A Dickinson TX 903C ONVOY, LLC - TX 560      
346-709 A League City TX 903C ONVOY, LLC - TX 560      
346-810 A Dickinson TX 903C ONVOY, LLC - TX 560      
409-204 A Hitchcock-Santa Fe TX 903C ONVOY, LLC - TX 560      
409-904 A Hitchcock-Santa Fe TX 903C ONVOY, LLC - TX 560      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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