Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7WM callsign genealogy
Currently held by Wingren, Michael J
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 K7WM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K7WM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7WM, oldest first.
- MATLOCK, MICHEAL W AZ2006-08-25 → cancelled 2018-11-06
- Wingren, Michael J WA2018-11-24 active