Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4DUK callsign genealogy
Currently held by Nayak, Satyam
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 KK4DUK's current licensee, walking backwards.
- Ducksworth, FredericFLgranted 2025-09-09cancelled 2025-12-09
Successor callsigns
Callsigns held now by people who previously held KK4DUK.
All historical holders
Every license row we've seen with the callsign KK4DUK, oldest first.
- Nayak, Satyam AL2011-08-22 → cancelled 2011-09-13
- Ducksworth, Frederic FL2025-12-09 → cancelled 2026-08-11