Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4JDM callsign genealogy
Currently held by MARSH, JEREMY D
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 W4JDM's current licensee, walking backwards.
- MASSARO, JONATHANTNgranted 2023-05-02cancelled 2023-11-07
Successor callsigns
Callsigns held now by people who previously held W4JDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4JDM, oldest first.
- MARSH, JEREMY D NC2013-04-27 → cancelled 2023-09-29
- Massaro, Jonathan D TN2023-11-07 active