Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF5III callsign genealogy
Currently held by Onassis, Christopher M
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 KF5III's current licensee, walking backwards.
- Nedbalek, Jerry WTXgranted 2010-08-27cancelled 2013-11-13
Successor callsigns
Callsigns held now by people who previously held KF5III.
- Onassis, Christopher MTXgranted 2010-09-17cancelled 2020-07-07
All historical holders
Every license row we've seen with the callsign KF5III, oldest first.
- Onassis, Christopher M TX2010-08-27 → cancelled 2010-09-17
- Nedbalek, Jerry W TX2024-04-23 active