Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K8MRJ callsign genealogy
Currently held by MESSMER SR, JOHN F
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 K8MRJ's current licensee, walking backwards.
- Jarden, Michael ROHgranted 2018-11-05cancelled 2020-02-11
Successor callsigns
Callsigns held now by people who previously held K8MRJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8MRJ, oldest first.
- MESSMER SR, JOHN F OH1988-02-23 → cancelled 2000-02-24
- Jarden, Michael R OH2020-02-11 active