Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K3OIU callsign genealogy
Currently held by Haden, Robert 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 K3OIU's current licensee, walking backwards.
- Haden, Robert EPAgranted 2015-03-19cancelled 2015-04-10
Successor callsigns
Callsigns held now by people who previously held K3OIU.
No current licensee on record previously held this callsign.