Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD9Y callsign genealogy
Currently held by Marks, Roland S
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 KD9Y's current licensee, walking backwards.
- Derk, James FILgranted 2014-05-09cancelled 2017-03-28
Successor callsigns
Callsigns held now by people who previously held KD9Y.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD9Y, oldest first.
- Marks, Roland S WI2004-12-10 → cancelled 2017-03-08
- Derk, James F IL2017-03-28 active