Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N7MDB callsign genealogy
Currently held by BURMEISTER-BROWN, MICHAEL
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 N7MDB's current licensee, walking backwards.
- Burmeister-Brown, MichaelORgranted 2022-10-18cancelled 2022-11-05
Successor callsigns
Callsigns held now by people who previously held N7MDB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7MDB, oldest first.
- UMBERGER, ROSE ANN M WA2008-10-02 → cancelled 2020-10-06
- BURMEISTER-BROWN, MICHAEL OR2022-11-05 active