Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR4MRJ callsign genealogy
Currently held by Grimm, Justin D
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 KR4MRJ's current licensee, walking backwards.
- Grimm, Justin DVAgranted 2026-04-21cancelled 2026-06-09
Successor callsigns
Callsigns held now by people who previously held KR4MRJ.
No current licensee on record previously held this callsign.