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.

OCN: 4009 MILLENNIUM TELCOM, LLC DBA ONESOURCE COMM. - TX

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
817-741 A Keller TX KLLRTX02DS0  552      
817-945 0 Fort Worth TX KLLRTX02DS2  552   2006-03-10   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.