Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W8MS callsign genealogy
Currently held by WALL, JACK F
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 W8MS's current licensee, walking backwards.
- STUFFLEBEAM, MARK EUTgranted 2010-04-23cancelled 2010-05-11
Successor callsigns
Callsigns held now by people who previously held W8MS.
- Watanabe, YukihiroMIgranted 2008-04-22cancelled 2009-01-06
All historical holders
Every license row we've seen with the callsign W8MS, oldest first.
- WALL, JACK F MI1997-01-28 → cancelled 2000-12-18
- Watanabe, Yukihiro MI2008-02-09 → cancelled 2008-04-22
- STUFFLEBEAM, MARK E UT2020-02-19 active