Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC0SGM callsign genealogy
Currently held by KELLY, THOMAS 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 KC0SGM's current licensee, walking backwards.
- KELLY, THOMAS LKSgranted 2021-08-24cancelled 2021-09-11
Successor callsigns
Callsigns held now by people who previously held KC0SGM.
- Balbinot, James RCOgranted 2014-06-04cancelled 2026-07-04
All historical holders
Every license row we've seen with the callsign KC0SGM, oldest first.
- Balbinot, James R CO2004-04-29 → cancelled 2004-07-03
- KELLY, THOMAS L KS2021-09-11 active