Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4GTM callsign genealogy
Currently held by MILLER, HENRY M
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 WB4GTM's current licensee, walking backwards.
- KN4BNHcancelledHidden Brow ClubALgranted 2017-03-06cancelled 2017-03-25
Successor callsigns
Callsigns held now by people who previously held WB4GTM.
- MILLER, HENRY MGAgranted 2018-10-15
All historical holders
Every license row we've seen with the callsign WB4GTM, oldest first.
- Hidden Brow Club AL2017-03-25 active
- MILLER, HENRY M— → cancelled 1999-01-07