Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9WTF callsign genealogy
Currently held by SCHWEINFURTH V, LUDWIG
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 N9WTF's current licensee, walking backwards.
- SCHWEINFURTH V, LUDWIGUTgranted 2016-02-29cancelled 2016-05-17
Successor callsigns
Callsigns held now by people who previously held N9WTF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9WTF, oldest first.
- SUTTON, RICHARD D IN2004-02-14 → cancelled 2016-04-27
- SCHWEINFURTH V, LUDWIG UT2026-04-15 active