Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4JDM callsign genealogy
Currently held by BLAKE, SALLY
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 N4JDM's current licensee, walking backwards.
- Malmberg, John DGAgranted 2020-02-18cancelled 2022-11-26
Successor callsigns
Callsigns held now by people who previously held N4JDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4JDM, oldest first.
- BLAKE, SALLY OH2010-04-13 → cancelled 2022-07-12
- Malmberg, John D GA2022-11-26 active