Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4RBH callsign genealogy
Currently held by MARSH, MICHAEL G
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 K4RBH's current licensee, walking backwards.
- MARSH, MICHAEL GKYgranted 2016-04-14cancelled 2016-05-03
Successor callsigns
Callsigns held now by people who previously held K4RBH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4RBH, oldest first.
- BELL, JOHN R KY2000-01-19 → cancelled 2012-01-24
- MARSH, MICHAEL G KY2026-03-14 active