Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD7WTF callsign genealogy
Currently held by WIERSCHKE, MARK E
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 KD7WTF's current licensee, walking backwards.
- Twilegar, SteveIDgranted 2014-08-14cancelled 2015-08-14
Successor callsigns
Callsigns held now by people who previously held KD7WTF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD7WTF, oldest first.
- WIERSCHKE, MARK E WA2003-06-28 → cancelled 2015-06-30
- Twilegar, Steve ID2015-08-14 active