Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4J callsign genealogy
Currently held by PEAK, MICHAEL P
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 KF4J's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KF4J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF4J, oldest first.
- Fillebrown, Arthur R VA2006-06-21 → cancelled 2018-09-12
- PEAK, MICHAEL P GA2018-10-02 active