Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7IDK callsign genealogy
Currently held by Dobroth, Michael L
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 W7IDK's current licensee, walking backwards.
- Dobroth, Michael LWAgranted 2016-03-07cancelled 2016-03-25
Successor callsigns
Callsigns held now by people who previously held W7IDK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7IDK, oldest first.
- GIRRES, RICHARD J MT1988-04-05 → cancelled 2000-04-06
- Dobroth, Michael L WA2026-01-24 active