Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4H callsign genealogy
Currently held by Shepard, Richard B
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 KO4H's current licensee, walking backwards.
- Gerlinger Jr, LouisFLgranted 2022-11-04cancelled 2026-06-19
Successor callsigns
Callsigns held now by people who previously held KO4H.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO4H, oldest first.
- Shepard, Richard B AL2014-03-31 → cancelled 2026-06-02
- Gerlinger Jr, Louis FL2026-06-19 active