Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4MDM callsign genealogy
Currently held by McBride, Martin 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 N4MDM's current licensee, walking backwards.
- McBride, Martin DCAgranted 2008-09-30cancelled 2009-03-24
Successor callsigns
Callsigns held now by people who previously held N4MDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4MDM, oldest first.
- ROBINSON, RHONDA T FL1995-04-04 → cancelled 2007-04-05
- McBride, Martin D NY2019-02-20 active