Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4RG callsign genealogy
Currently held by Groess, Robert
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 KD4RG's current licensee, walking backwards.
- Groess, RobertFLgranted 2020-10-08cancelled 2020-11-10
Successor callsigns
Callsigns held now by people who previously held KD4RG.
- Groess, RobertILgranted 2025-02-28