Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6GSM callsign genealogy
Currently held by Schwager, Marc
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 K6GSM's current licensee, walking backwards.
- Schwager, MarcCAgranted 2022-05-24cancelled 2022-06-24
Successor callsigns
Callsigns held now by people who previously held K6GSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6GSM, oldest first.
- Mena, Gregory S CA2009-08-07 → cancelled 2021-08-10
- Schwager, Marc CA2022-06-24 active