Confidence: Medium · Source: FCC ULS · As of 2026-09-10
KB4RJS callsign genealogy
Currently held by FONDRIEST, WILLIAM D
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 KB4RJS's current licensee, walking backwards.
- Stahurski, Richard JGAgranted 2016-07-07cancelled 2016-08-12
Successor callsigns
Callsigns held now by people who previously held KB4RJS.
- Stahurski, Richard JFLgranted 2023-03-28
All historical holders
Every license row we've seen with the callsign KB4RJS, oldest first.
- FONDRIEST, WILLIAM D FL1995-11-28 → cancelled 2007-11-29
- Stahurski, Richard J FL2016-08-12 → cancelled 2023-03-28