Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5MDK callsign genealogy
Currently held by Kurrus, 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 N5MDK's current licensee, walking backwards.
- Kurrus, Mark DWAgranted 2025-04-18cancelled 2026-04-07
Successor callsigns
Callsigns held now by people who previously held N5MDK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5MDK, oldest first.
- CROOK, RONALD R CA1998-04-24 → cancelled 2010-04-27
- Kurrus, Mark D WA2026-04-07 active