Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC6JSM callsign genealogy
Currently held by DIXON, OM
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 KC6JSM's current licensee, walking backwards.
- McMartin, John SCAgranted 2006-06-06cancelled 2006-07-18
Successor callsigns
Callsigns held now by people who previously held KC6JSM.
- MCMARTIN, JOHN SCAgranted 2026-02-19
All historical holders
Every license row we've seen with the callsign KC6JSM, oldest first.
- DIXON, OM CA1990-03-27 → cancelled 2002-03-28
- McMartin, John S CA2006-07-18 → cancelled 2016-03-15