Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FFF callsign genealogy
Currently held by McCartha Jr, James 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 K4FFF's current licensee, walking backwards.
- McCartha Jr, James MFLgranted 2013-04-01cancelled 2016-08-02
Successor callsigns
Callsigns held now by people who previously held K4FFF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4FFF, oldest first.
- FISTS CW CLUB OF FLORIDA FL2000-01-07 → cancelled 2012-01-10
- McCartha Jr, James M FL2016-08-02 active