Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4XYX callsign genealogy
Currently held by ZEMANEK, GREGORY W
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 K4XYX's current licensee, walking backwards.
- Askins, William TSCgranted 2021-02-16cancelled 2021-03-09
Successor callsigns
Callsigns held now by people who previously held K4XYX.
- ZEMANEK, GREGORY WFLgranted 2017-04-01
All historical holders
Every license row we've seen with the callsign K4XYX, oldest first.
- ZEMANEK, GREGORY W TN2014-11-01 → cancelled 2017-04-01
- Askins, William T SC2021-03-09 active