Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR3OC callsign genealogy
Currently held by Koch, Rudy R
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 KR3OC's current licensee, walking backwards.
- Koch, Rudy RMDgranted 2010-02-26cancelled 2010-12-24
Successor callsigns
Callsigns held now by people who previously held KR3OC.
No current licensee on record previously held this callsign.