Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WQ6U callsign genealogy
Currently held by Zapf, David T
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 WQ6U's current licensee, walking backwards.
- Zapf, David TCAgranted 2010-02-24cancelled 2011-04-19
Successor callsigns
Callsigns held now by people who previously held WQ6U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WQ6U, oldest first.
- PLAGEMAN, CALVIN C CA1994-04-26 → cancelled 2006-04-27
- Zapf, David T CA2021-01-26 active