Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4DDU callsign genealogy
Currently held by WENZEL, FREDERICK 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 K4DDU's current licensee, walking backwards.
- NICHOLS, DREW TFLgranted 2014-04-17cancelled 2014-07-25
Successor callsigns
Callsigns held now by people who previously held K4DDU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4DDU, oldest first.
- WENZEL, FREDERICK E FL1988-01-19 → cancelled 2000-01-20
- NICHOLS, DREW T CA2024-05-17 active