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: 603

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-603 A Fort Worth TX DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
817-603 0 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   
817-603 1 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   
817-603 2 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   
817-603 3 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   
817-603 4 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   
817-603 5 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   
817-603 6 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   
817-603 7 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   
817-603 8 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   
817-603 9 Fort Worth TX   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-02-03   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.