Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY9F callsign genealogy
Currently held by OBREMSKI, ROBERT H
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 KY9F's current licensee, walking backwards.
- OBREMSKI, ROBERT HINgranted 2008-02-20cancelled 2012-01-18
Successor callsigns
Callsigns held now by people who previously held KY9F.
- BRENDLE, TROYFLgranted 2009-12-29cancelled 2021-12-30
All historical holders
Every license row we've seen with the callsign KY9F, oldest first.
- Brendle, Troy FL2007-12-27 → cancelled 2009-12-29
- OBREMSKI, ROBERT H IN2021-10-21 active