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: 566

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-566 A Fort Worth TX DLLSTXHM0MD  829J PAETEC ITEL, LLC 552   2025-01-23   
817-566 0 Fort Worth TX DLLSTXHM0MD  829J PAETEC ITEL, LLC 552      
817-566 1 Fort Worth TX DLLSTXHM0MD  829J PAETEC ITEL, LLC 552      
817-566 2 Fort Worth TX DLLSTXTAXTZ  624H ONVOY SPECTRUM, LLC 552   2021-11-19   
817-566 3 Fort Worth TX DLLTTXID1MD  5562 METROPCS, INC. 552   2007-06-27   
817-566 4 Fort Worth TX DLLTTXID1MD  5562 METROPCS, INC. 552   2007-04-29   
817-566 5 Fort Worth TX DLLTTXID1MD  5562 METROPCS, INC. 552   2007-04-29   
817-566 6 Fort Worth TX DLLTTXID1MD  5562 METROPCS, INC. 552   2007-04-29   
817-566 7 Fort Worth TX DLLSTXHM0MD  829J PAETEC ITEL, LLC 552      
817-566 8 Fort Worth TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2005-03-06   
817-566 9 Fort Worth TX DLLSTXHM0MD  829J PAETEC ITEL, LLC 552      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.