Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4S callsign genealogy
Currently held by TURKEL, ROBERT A
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 KD4S's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KD4S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4S, oldest first.
- TURKEL, ROBERT A FL2005-01-25 → cancelled 2017-01-26
- MC CLAIN, RICHARD L SC2017-02-14 active