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.

NPA: 817 [Rate centres in NPA 817] [Dial plan for NPA 817]

NXX: 772

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-772 A Atlas EMS TX FTWOTXEDDS6  7421 AT&T - LOCAL 552      
817-772 8 Atlas EMS TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2003-10-27   
817-772 9 Atlas EMS TX FTWOTXEDDS6  7421 AT&T - LOCAL 552   2003-03-29   

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.