Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4DH callsign genealogy
Currently held by RICHARZ, WILLIAM 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 N4DH's current licensee, walking backwards.
- WILSON, DEAN CNCgranted 2020-06-17cancelled 2021-08-03
Successor callsigns
Callsigns held now by people who previously held N4DH.
- RICHARZ, WILLIAM MNCgranted 2000-01-21cancelled 2000-05-20
All historical holders
Every license row we've seen with the callsign N4DH, oldest first.
- RICHARZ, WILLIAM M NC1996-12-18 → cancelled 2000-01-21
- RICHARZ, WILLIAM M NC2010-03-16 → cancelled 2019-07-14
- WILSON, DEAN C NC2021-08-03 active