Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD9U callsign genealogy
Currently held by Griffith, Richard C
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 KD9U's current licensee, walking backwards.
- OLIVER, DAVID JINgranted 2007-12-19cancelled 2010-04-06
Successor callsigns
Callsigns held now by people who previously held KD9U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD9U, oldest first.
- Griffith, Richard C IL2004-10-28 → cancelled 2007-05-19
- OLIVER, DAVID J IN2020-03-31 active