Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9YHF callsign genealogy
Currently held by OHM, CLIFFORD F
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 N9YHF's current licensee, walking backwards.
- Thornburg, Alex HWIgranted 2016-06-13cancelled 2016-08-02
Successor callsigns
Callsigns held now by people who previously held N9YHF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9YHF, oldest first.
- OHM, CLIFFORD F WI1994-08-22 → cancelled 2006-08-23
- Thornburg, Alex H WI2026-07-17 active