Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4F callsign genealogy
Currently held by JOHNSON JR, JAMES 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 KY4F's current licensee, walking backwards.
- MC LEAN, DAVID LFLgranted 2021-07-08cancelled 2021-12-28
Successor callsigns
Callsigns held now by people who previously held KY4F.
- HAFT, DOUGLAS WALgranted 2019-12-07
All historical holders
Every license row we've seen with the callsign KY4F, oldest first.
- JOHNSON JR, JAMES B FL1994-11-21 → cancelled 2006-11-22
- HAFT, DOUGLAS W AL2016-10-07 → cancelled 2019-12-07
- MC LEAN, DAVID L FL2021-12-28 active