Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4OI callsign genealogy
Currently held by JONES, THOMAS 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 KB4OI's current licensee, walking backwards.
- DEACON, JOHN CNCgranted 2016-05-16cancelled 2018-09-14
Successor callsigns
Callsigns held now by people who previously held KB4OI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4OI, oldest first.
- JONES, THOMAS J FL1994-03-29 → cancelled 2006-03-30
- DEACON, JOHN C NC2018-09-14 active