Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9RMR callsign genealogy
Currently held by CHAPMAN SR, ROBERT J
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 K9RMR's current licensee, walking backwards.
- Rueff, Randall MINgranted 2016-12-29cancelled 2017-02-07
Successor callsigns
Callsigns held now by people who previously held K9RMR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9RMR, oldest first.
- CHAPMAN SR, ROBERT J MO1988-08-09 → cancelled 2000-08-10
- Rueff, Randall M IN2017-02-07 active