Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9GM callsign genealogy
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 KB9GM's current licensee, walking backwards.
- LaBonte, Thomas CILgranted 2016-04-20cancelled 2020-02-19
Successor callsigns
Callsigns held now by people who previously held KB9GM.
- DAHM, CLIFFORD NWIgranted 1998-11-23cancelled 2001-04-03
All historical holders
Every license row we've seen with the callsign KB9GM, oldest first.
- LaBonte, Thomas C MO2020-02-19 active
- —— → cancelled 1998-11-23