Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KU4DZU callsign genealogy
Currently held by Clark, David O
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 KU4DZU's current licensee, walking backwards.
- Clark, David OTNgranted 2014-02-07cancelled 2014-03-01
Successor callsigns
Callsigns held now by people who previously held KU4DZU.
No current licensee on record previously held this callsign.