Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4DMC callsign genealogy
Currently held by CHRISSMAN, DOUGLAS M
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 N4DMC's current licensee, walking backwards.
- CHRISSMAN, DOUGLAS MNCgranted 2011-03-22cancelled 2011-04-15
Successor callsigns
Callsigns held now by people who previously held N4DMC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4DMC, oldest first.
- WITKAMP, MARTINUS CO1999-03-17 → cancelled 2011-03-18
- CHRISSMAN, DOUGLAS M NC2022-02-04 active