Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4TRT callsign genealogy
Currently held by WILLIAMS, ROBERT B
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 K4TRT's current licensee, walking backwards.
- Imlau, DavidGAgranted 2023-03-15cancelled 2023-05-06
Successor callsigns
Callsigns held now by people who previously held K4TRT.
- PRECODA, KARL RVAgranted 2020-10-31
All historical holders
Every license row we've seen with the callsign K4TRT, oldest first.
- WILLIAMS, ROBERT B KY1987-09-01 → cancelled 1999-09-02
- PRECODA, KARL R VA2016-06-24 → cancelled 2020-10-31
- Imlau, David GA2023-05-06 active