Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4ESM callsign genealogy
Currently held by TUCKER III, WILLIAM L
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 KD4ESM's current licensee, walking backwards.
- Marcos, Elba SFLgranted 2022-06-28cancelled 2022-07-23
Successor callsigns
Callsigns held now by people who previously held KD4ESM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4ESM, oldest first.
- TUCKER III, WILLIAM L AL1991-09-10 → cancelled 2003-09-11
- Marcos, Elba S FL2022-07-23 active