Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6JSM callsign genealogy
Currently held by Marcum, Joshua S
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 K6JSM's current licensee, walking backwards.
- Marcum, Joshua SNVgranted 2020-05-20cancelled 2020-06-09
Successor callsigns
Callsigns held now by people who previously held K6JSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6JSM, oldest first.
- TRONE, ALFRED B CA2006-11-21 → cancelled 2019-02-13
- Marcum, Joshua S NV2020-06-09 active