Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4MAR callsign genealogy
Currently held by RUIZ, MERCY
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 KJ4MAR's current licensee, walking backwards.
- RUIZ, MERCYFLgranted 2013-01-29cancelled 2013-02-16
Successor callsigns
Callsigns held now by people who previously held KJ4MAR.
- Eades, Sam RFLgranted 2020-03-20
All historical holders
Every license row we've seen with the callsign KJ4MAR, oldest first.
- Eades, Sam R GA2009-05-14 → cancelled 2009-11-06
- RUIZ, MERCY FL2024-01-18 active