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: 439

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-439 A Fort Worth TX FTWOTXCEDS0  9533 SOUTHWESTERN BELL 552      
817-439 0 Fort Worth TX FTWOTXCEDS0  9533 SOUTHWESTERN BELL 552      
817-439 1 Fort Worth TX FTWOTXCEDS0  9533 SOUTHWESTERN BELL 552      
817-439 2 Fort Worth TX FTWOTXCEDS0  9533 SOUTHWESTERN BELL 552      
817-439 3 Fort Worth TX FTWOTXCEDS0  9533 SOUTHWESTERN BELL 552      
817-439 4 Fort Worth TX FTWOTXCEDS0  9533 SOUTHWESTERN BELL 552      
817-439 5 Fort Worth TX FTWOTXCEDS0  9533 SOUTHWESTERN BELL 552      
817-439 6 Fort Worth TX DLLSTXSQDS2  8958 XO TEXAS, INC. 552   2007-05-04   
817-439 7 Fort Worth TX DLLSTXSQDS2  8958 XO TEXAS, INC. 552   2007-05-04   
817-439 8 Fort Worth TX FTWOTXCEDS0  9533 SOUTHWESTERN BELL 552      
817-439 9 Fort Worth TX FTWPTXZPPS0  353D CHARTER FIBERLINK TX-CCO, LLC - TX 552   2013-08-16   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.