Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4GDD callsign genealogy
Currently held by JEFFERS, WILLIAM 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 K4GDD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4GDD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4GDD, oldest first.
- JEFFERS, WILLIAM J FL2004-10-09 → cancelled 2016-12-17
- Caesar, Michael B FL2022-04-26 active