Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K8DTJ callsign genealogy
Currently held by Kumon, Ronald 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 K8DTJ's current licensee, walking backwards.
- Kumon, Ronald EMIgranted 2020-08-06cancelled 2022-07-26
Successor callsigns
Callsigns held now by people who previously held K8DTJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8DTJ, oldest first.
- KUMON, HENRY V MI2020-07-08 → cancelled 2022-05-15
- Kumon, Ronald E MI2022-07-26 active