Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4JJ callsign genealogy
Currently held by Jett, Jason 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 KB4JJ's current licensee, walking backwards.
- Jett, Jason LTXgranted 2024-09-10cancelled 2024-09-28
Successor callsigns
Callsigns held now by people who previously held KB4JJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4JJ, oldest first.
- Jett, Jason L TX2007-05-15 → cancelled 2019-05-16
- Jett, Jason L TX2024-09-28 active