Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KU3U callsign genealogy
Currently held by SCHMIDT, ROBERT F
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 KU3U's current licensee, walking backwards.
- SCHMIDT, ROBERT FFLgranted 2015-09-10cancelled 2016-08-26
Successor callsigns
Callsigns held now by people who previously held KU3U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KU3U, oldest first.
- MARKER, ALAN C PA2004-05-12 → cancelled 2016-08-09
- SCHMIDT, ROBERT F FL2016-08-26 active