Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4HDX callsign genealogy
Currently held by Scasciafratti, Gianfranco
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 KJ4HDX's current licensee, walking backwards.
- Black, Joseph MNCgranted 2019-07-01cancelled 2019-07-23
Successor callsigns
Callsigns held now by people who previously held KJ4HDX.
- Scasciafratti, GianfrancoSCgranted 2019-10-22
All historical holders
Every license row we've seen with the callsign KJ4HDX, oldest first.
- Scasciafratti, Gianfranco SC2008-10-14 → cancelled 2009-10-23
- Black, Joseph M NC2019-07-23 active