Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI5AUS callsign genealogy
Currently held by Guadarrama, Jonathan L
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 KI5AUS's current licensee, walking backwards.
- Gleason, Brian DTXgranted 2020-12-23cancelled 2021-01-15
Successor callsigns
Callsigns held now by people who previously held KI5AUS.
- Guadarrama, Jonathan LTXgranted 2018-07-31cancelled 2020-02-19
All historical holders
Every license row we've seen with the callsign KI5AUS, oldest first.
- Guadarrama, Jonathan L TX2018-07-10 → cancelled 2018-07-31
- Gleason, Brian D TX2021-01-15 active