Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7MOS callsign genealogy
Currently held by STEADMAN, MARVIN O
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 K7MOS's current licensee, walking backwards.
- STEADMAN, MARVIN OUTgranted 2020-02-19cancelled 2020-06-16
Successor callsigns
Callsigns held now by people who previously held K7MOS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7MOS, oldest first.
- KOSMANN, CHARLES T MT2008-04-10 → cancelled 2020-05-21
- STEADMAN, MARVIN O UT2020-06-16 active