Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N8DEF callsign genealogy
Currently held by HUMPHREYS, MARK R
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 N8DEF's current licensee, walking backwards.
- Funk, Don EOHgranted 2026-01-15cancelled 2026-02-03
Successor callsigns
Callsigns held now by people who previously held N8DEF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N8DEF, oldest first.
- HUMPHREYS, MARK R MI1996-02-28 → cancelled 2003-01-17
- Delta Township MI2004-04-28 → cancelled 2016-04-29
- Funk, Don E OH2026-02-03 active