Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WN4USM callsign genealogy
Currently held by Marshall, Duane 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 WN4USM's current licensee, walking backwards.
- Marshall, Duane DALgranted 2020-09-14cancelled 2020-10-02
Successor callsigns
Callsigns held now by people who previously held WN4USM.
No current licensee on record previously held this callsign.