Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WO9O callsign genealogy
Currently held by TROSKY, DONALD G
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 WO9O's current licensee, walking backwards.
- Richerson, Richard LAZgranted 2024-06-01cancelled 2024-11-05
Successor callsigns
Callsigns held now by people who previously held WO9O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WO9O, oldest first.
- TROSKY, DONALD G TN2012-08-17 → cancelled 2024-08-20
- Richerson, Richard L AZ2024-11-05 active