Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9THU callsign genealogy
Currently held by KEEFE, ROBERT W
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 K9THU's current licensee, walking backwards.
- Keefe, Gail AILgranted 2024-06-19cancelled 2024-07-09
Successor callsigns
Callsigns held now by people who previously held K9THU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9THU, oldest first.
- KEEFE, ROBERT W IL2007-10-16 → cancelled 2019-10-17
- KEEFE, GAIL A IL2024-07-09 active