Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9MDB callsign genealogy
Currently held by Black, Michael D
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 W9MDB's current licensee, walking backwards.
- Black, Michael DILgranted 2013-02-14cancelled 2013-05-14
Successor callsigns
Callsigns held now by people who previously held W9MDB.
- FETZER, BRUCE LNCgranted 2000-12-01cancelled 2012-12-04
All historical holders
Every license row we've seen with the callsign W9MDB, oldest first.
- FETZER, BRUCE L NC1995-04-17 → cancelled 2000-12-01
- Black, Michael D IL2023-03-07 active