Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9HMR callsign genealogy
Currently held by DOOT, MARTIN
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 K9HMR's current licensee, walking backwards.
- Ruetschlin, Harry MILgranted 2019-10-15cancelled 2019-11-05
Successor callsigns
Callsigns held now by people who previously held K9HMR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9HMR, oldest first.
- DOOT, MARTIN IL2006-08-03 → cancelled 2018-09-25
- Ruetschlin, Harry M IL2019-11-05 active