Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF6MST callsign genealogy
Currently held by MAC ADAMS, DAVID 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 KF6MST's current licensee, walking backwards.
- Tsihlas, Manuel SCAgranted 2012-05-11cancelled 2022-02-18
Successor callsigns
Callsigns held now by people who previously held KF6MST.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF6MST, oldest first.
- MAC ADAMS, DAVID L CA1997-07-09 → cancelled 2007-01-13
- Tsihlas, Manuel S CA2022-02-18 active