Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4GRO callsign genealogy
Currently held by Campbell, Robin L
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 KD4GRO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KD4GRO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4GRO, oldest first.
- BRADLEY, OTIS W AL1997-02-18 → cancelled 2005-12-29
- Campbell, Robin L AL2019-07-16 active