Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC9FYO callsign genealogy
Currently held by Trautman, Michael L
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 KC9FYO's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KC9FYO.
- Trautman, Michael LILgranted 2024-02-28