Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MJS callsign genealogy
Currently held by SKELTON, ROBERT M
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 K4MJS's current licensee, walking backwards.
- Swan, Michael JGAgranted 2009-12-02cancelled 2016-11-04
Successor callsigns
Callsigns held now by people who previously held K4MJS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MJS, oldest first.
- SKELTON, ROBERT M AL1988-08-16 → cancelled 2000-08-17
- Swan, Michael J GA2016-11-04 active