Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9BMT callsign genealogy
Currently held by Taubert, Robert 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 KD9BMT's current licensee, walking backwards.
- Taubert, Robert MWIgranted 2024-01-31cancelled 2025-04-12
Successor callsigns
Callsigns held now by people who previously held KD9BMT.
- CALO, BERNARDILgranted 2024-05-02
All historical holders
Every license row we've seen with the callsign KD9BMT, oldest first.
- CALO, BERNARD IL2014-06-16 → cancelled 2014-08-14
- Taubert, Robert M WI2025-04-12 active