Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4HYP callsign genealogy
Currently held by COOK, DANNY C
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 KD4HYP's current licensee, walking backwards.
- Cook, Danny CMOgranted 2015-01-22cancelled 2015-07-21
Successor callsigns
Callsigns held now by people who previously held KD4HYP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4HYP, oldest first.
- COOK, DANNY C FL1991-12-10 → cancelled 2003-12-11
- Cook, Danny C MO2015-07-21 active