Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WM7F callsign genealogy
Currently held by THOMPSON, JOHN 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 WM7F's current licensee, walking backwards.
- Macomson, WisORgranted 2000-08-01cancelled 2000-09-29
Successor callsigns
Callsigns held now by people who previously held WM7F.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WM7F, oldest first.
- THOMPSON, JOHN L WA1988-03-22 → cancelled 2000-03-23
- Macomson, Wis OR2020-07-02 active