Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4XAA callsign genealogy
Currently held by Ferster, Jason 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 K4XAA's current licensee, walking backwards.
- Ferster, Jason BSCgranted 2020-08-28cancelled 2024-11-05
Successor callsigns
Callsigns held now by people who previously held K4XAA.
- WILSON, ROBERT WDEgranted 2018-11-24
All historical holders
Every license row we've seen with the callsign K4XAA, oldest first.
- WILSON, ROBERT W GA2017-03-14 → cancelled 2018-11-24
- Ferster, Jason B SC2024-11-05 active