Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD0SF callsign genealogy
Currently held by TUCKER, DARRELL R
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 KD0SF's current licensee, walking backwards.
- TUCKER, DARRELL RMOgranted 2019-07-16cancelled 2025-12-30
Successor callsigns
Callsigns held now by people who previously held KD0SF.
All historical holders
Every license row we've seen with the callsign KD0SF, oldest first.
- Cook, Kieth J MN1998-10-19 → cancelled 2006-07-11
- TUCKER, DARRELL R MO2025-12-30 → cancelled 2026-03-24