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: 857

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-857 A Euless TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
817-857 0 Euless TX FTWOTXEDX1Z  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552   2018-05-28   
817-857 1 Euless TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
817-857 2 Euless TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2021-07-15   
817-857 3 Euless TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
817-857 4 Euless TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2018-03-03   
817-857 5 Euless TX DLLSTXJFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2018-05-10   
817-857 6 Euless TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2011-12-24   
817-857 7 Euless TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2013-12-06   
817-857 8 Euless TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2013-12-06   
817-857 9 Euless TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2003-07-21   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.