Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9CB callsign genealogy
Currently held by MIKUSCH, JOHN 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 KB9CB's current licensee, walking backwards.
- BONIFIELD JR, CHARLES EILgranted 2014-05-16cancelled 2022-03-01
Successor callsigns
Callsigns held now by people who previously held KB9CB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB9CB, oldest first.
- MIKUSCH, JOHN L IL1993-03-30 → cancelled 2005-03-31
- BONIFIELD JR, CHARLES E IL2022-03-01 active