Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6JDK callsign genealogy
Currently held by LIST, DAVID L
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 K6JDK's current licensee, walking backwards.
- Denning, Justin LCAgranted 2020-07-20cancelled 2020-08-14
Successor callsigns
Callsigns held now by people who previously held K6JDK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6JDK, oldest first.
- LIST, DAVID L CA1998-04-22 → cancelled 2010-04-23
- Denning, Justin L CA2020-08-14 active