Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9STX callsign genealogy
Currently held by Hickman, Robert A
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 K9STX's current licensee, walking backwards.
- Hickman, Robert ATXgranted 2021-03-16cancelled 2022-04-02
Successor callsigns
Callsigns held now by people who previously held K9STX.
- Hase, YoshinobuMPgranted 2008-11-14cancelled 2014-07-08
All historical holders
Every license row we've seen with the callsign K9STX, oldest first.
- WALDO, RALPH S IN1996-04-22 → cancelled 1999-03-20
- Hase, Yoshinobu CA2008-07-01 → cancelled 2008-11-14
- Hickman, Robert A TX2022-04-02 active