Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9CMB callsign genealogy
Currently held by Sloan, Howard L
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 K9CMB's current licensee, walking backwards.
- BROWN, CHRISTOPHER MILgranted 2023-05-13cancelled 2023-06-02
Successor callsigns
Callsigns held now by people who previously held K9CMB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9CMB, oldest first.
- Sloan, Howard L WI2007-03-14 → cancelled 2019-04-30
- BROWN, CHRISTOPHER M IL2023-06-02 active