Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9MCB callsign genealogy
Currently held by 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 K9MCB's current licensee, walking backwards.
- Brown, MichaelTXgranted 2020-10-06cancelled 2020-12-11
Successor callsigns
Callsigns held now by people who previously held K9MCB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9MCB, oldest first.
- Boronow, Mary C AL2007-04-13 → cancelled 2019-04-16
- Brown, Michael TX2020-12-11 active