Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6DDT callsign genealogy
Currently held by THORNHILL JR, HENRY E
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by W6DDT's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W6DDT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6DDT, oldest first.
- THORNHILL JR, HENRY E CA1997-05-30 → cancelled 2009-06-02
- Todd, Daniel D CA2021-02-24 active