Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KB6JSU callsign genealogy
Currently held by PATTERSON, JAMES C
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 KB6JSU's current licensee, walking backwards.
- Hardt, RobertCAgranted 2019-11-12cancelled 2020-04-24
Successor callsigns
Callsigns held now by people who previously held KB6JSU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB6JSU, oldest first.
- PATTERSON, JAMES C CA1999-03-02 → cancelled 2011-03-03
- Hardt, Robert FL2020-04-24 active