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: 539

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-539 A Mansfield TX FTWOTXBRDS0  9533 SOUTHWESTERN BELL 552      
817-539 0 Mansfield TX FTWOTXBRDS0  9533 SOUTHWESTERN BELL 552      
817-539 1 Mansfield TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2003-01-06   
817-539 2 Mansfield TX FTWOTXBRDS0  9533 SOUTHWESTERN BELL 552   2008-02-01   
817-539 3 Mansfield TX DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2003-07-16   
817-539 4 Mansfield TX FTWOTXEDDS4  7421 AT&T - LOCAL 552   2003-10-22   
817-539 5 Mansfield TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2014-07-17   
817-539 6 Mansfield TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2015-01-01   
817-539 7 Mansfield TX FTWOTXBRDS0  9533 SOUTHWESTERN BELL 552   2007-01-26   
817-539 8 Mansfield TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2004-04-04   
817-539 9 Mansfield TX RCSNTXHVBMD  516C AT&T CORP. 552   2014-11-17   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.