Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9UTM callsign genealogy
Currently held by Biros Jr, Thomas A
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 K9UTM's current licensee, walking backwards.
- Biros Jr, Thomas AILgranted 2002-03-11cancelled 2002-06-18
Successor callsigns
Callsigns held now by people who previously held K9UTM.
No current licensee on record previously held this callsign.