Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9KJB callsign genealogy
Currently held by Baumann, Kevin J
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 KB9KJB's current licensee, walking backwards.
- Baumann, Kevin JWIgranted 2011-04-04cancelled 2011-04-22
Successor callsigns
Callsigns held now by people who previously held KB9KJB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB9KJB, oldest first.
- MATHEWS, ROBERT H WI1995-05-09 → cancelled 2007-05-10
- Baumann, Kevin J WI2022-06-08 active