Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4TDM callsign genealogy
Currently held by MC KINSEY, JEFF L
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 N4TDM's current licensee, walking backwards.
- MARTIN, TIMOTHY DNCgranted 2017-09-11cancelled 2017-10-03
Successor callsigns
Callsigns held now by people who previously held N4TDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4TDM, oldest first.
- MC KINSEY, JEFF L FL1998-02-25 → cancelled 2010-02-26
- MARTIN, TIMOTHY D NC2017-10-03 active