Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4MDR callsign genealogy
Currently held by Robinson, Mark 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 N4MDR's current licensee, walking backwards.
- Robinson, Mark DVAgranted 2019-11-12cancelled 2020-07-31
Successor callsigns
Callsigns held now by people who previously held N4MDR.
No current licensee on record previously held this callsign.