Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KU4ZD callsign genealogy
Currently held by Donovan, Michael J
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 KU4ZD's current licensee, walking backwards.
- DONOVAN, MICHAEL Jcancelled 1999-04-06
Successor callsigns
Callsigns held now by people who previously held KU4ZD.
No current licensee on record previously held this callsign.