Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SWD callsign genealogy
Currently held by Clark, Jason K
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 K4SWD's current licensee, walking backwards.
- Clark, Jason KKYgranted 2025-05-30cancelled 2025-06-17
Successor callsigns
Callsigns held now by people who previously held K4SWD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SWD, oldest first.
- SANSBURY JR, STEPHEN I SC1998-02-25 → cancelled 2010-02-26
- Clark, Jason K KY2025-06-17 active