Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7DKU callsign genealogy
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 W7DKU's current licensee, walking backwards.
- HARPER, DANAAZgranted 2021-04-01cancelled 2021-04-20
Successor callsigns
Callsigns held now by people who previously held W7DKU.
- Witzke, Richard AAZgranted 2018-08-21
All historical holders
Every license row we've seen with the callsign W7DKU, oldest first.
- Witzke, Richard A AZ2012-07-20 → cancelled 2018-08-21
- HARPER, DANA AZ2021-04-20 active
- ——