Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9MCD callsign genealogy
Currently held by HAMILTON, JOHN J
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 N9MCD's current licensee, walking backwards.
- DAVIS, MARK CILgranted 2020-04-28cancelled 2020-05-16
Successor callsigns
Callsigns held now by people who previously held N9MCD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9MCD, oldest first.
- HAMILTON, JOHN J IN1991-07-23 → cancelled 2003-07-24
- DAVIS, MARK C IL2020-05-16 active