Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JMM callsign genealogy
Currently held by MARTELL RAMOS, JESUS 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 K4JMM's current licensee, walking backwards.
- MARTELL RAMOS, JESUS MFLgranted 2020-09-10cancelled 2020-10-31
Successor callsigns
Callsigns held now by people who previously held K4JMM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4JMM, oldest first.
- MAC LANE, DONALD L GA2007-02-05 → cancelled 2019-03-22
- MARTELL RAMOS, JESUS M FL2020-10-31 active