Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4JJB callsign genealogy
Currently held by Bourgeois, John 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 K4JJB's current licensee, walking backwards.
- Bourgeois, John JSCgranted 2007-10-16cancelled 2008-08-09
Successor callsigns
Callsigns held now by people who previously held K4JJB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4JJB, oldest first.
- SANDBERG, BEN L FL1996-05-31 → cancelled 2008-06-03
- Bourgeois, John J SC2018-06-26 active