Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC6UUA callsign genealogy
Currently held by THORNBURGH, MICHAEL C
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 KC6UUA's current licensee, walking backwards.
- Thornburgh, Michael CCAgranted 2025-01-11cancelled 2025-01-31
Successor callsigns
Callsigns held now by people who previously held KC6UUA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC6UUA, oldest first.
- THORNBURGH, MICHAEL C CA2011-06-08 → cancelled 2023-06-09
- Thornburgh, Michael C CA2025-01-31 active