Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0DEF callsign genealogy
Currently held by Freeze, Donald E
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 K0DEF's current licensee, walking backwards.
- Freeze, Donald EMIgranted 2017-11-30cancelled 2017-12-22
Successor callsigns
Callsigns held now by people who previously held K0DEF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0DEF, oldest first.
- NELSON, RICHARD W MN1988-04-19 → cancelled 2000-04-20
- Freeze, Donald E MI2017-12-22 active