Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF4VXN callsign genealogy
Currently held by WILLIAMS, JOSEPH M
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 KF4VXN's current licensee, walking backwards.
- WILLIAMS, JOSEPH MSCgranted 2015-01-23cancelled 2018-11-02
Successor callsigns
Callsigns held now by people who previously held KF4VXN.
- WILLIAMS, JOSEPH MSCgranted 2015-01-23cancelled 2018-11-02
All historical holders
Every license row we've seen with the callsign KF4VXN, oldest first.
- WILLIAMS, JOSEPH M SC1998-02-25 → cancelled 2004-11-02
- WILLIAMS, JOSEPH M SC2018-11-02 active