Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO9T callsign genealogy
Currently held by HAMMER, JAMES T
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 KO9T's current licensee, walking backwards.
- Friedman, GeraldVAgranted 2025-12-12cancelled 2026-03-31
Successor callsigns
Callsigns held now by people who previously held KO9T.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO9T, oldest first.
- HAMMER, JAMES T IN2013-09-04 → cancelled 2026-03-06
- Friedman, Gerald VA2026-03-31 active