Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4JJD callsign genealogy
Currently held by DEGRASSE, JEFFREY J
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 K4JJD's current licensee, walking backwards.
- DEGRASSE, JEFFREY JFLgranted 2016-03-14cancelled 2016-04-09
Successor callsigns
Callsigns held now by people who previously held K4JJD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4JJD, oldest first.
- MANNS, JAMES C KY2001-08-31 → cancelled 2013-09-04
- DEGRASSE, JEFFREY J MI2026-04-03 active