Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9ONR callsign genealogy
Currently held by Trinterud, John 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 K9ONR's current licensee, walking backwards.
- Trinterud, John RCAgranted 2011-05-23cancelled 2012-08-10
Successor callsigns
Callsigns held now by people who previously held K9ONR.
No current licensee on record previously held this callsign.