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: DLLSTX3790Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
214-844 A Dallas TX 114J EXIANT COMMUNICATIONS LLC 552      
817-844 A Fort Worth TX 114J EXIANT COMMUNICATIONS LLC 552      
817-947 A Kennedale TX 114J EXIANT COMMUNICATIONS LLC 552      
940-248 A Aubrey TX 114J EXIANT COMMUNICATIONS LLC 552      
940-248 1 Aubrey TX 114J EXIANT COMMUNICATIONS LLC 552   2018-04-23   
972-844 A Dallas TX 114J EXIANT COMMUNICATIONS LLC 552      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.