Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9JMB callsign genealogy
Currently held by Barnes, James 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 KC9JMB's current licensee, walking backwards.
- Bolin, Jon MMOgranted 2026-07-14cancelled 2026-08-01
Successor callsigns
Callsigns held now by people who previously held KC9JMB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC9JMB, oldest first.
- Barnes, James M IN2005-07-23 → cancelled 2017-07-25
- Bolin, Jon M MO2026-08-01 active