Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ9J callsign genealogy
Currently held by Straup, Newton F
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 KJ9J's current licensee, walking backwards.
- Knepple, James EWIgranted 2016-03-10cancelled 2016-06-10
Successor callsigns
Callsigns held now by people who previously held KJ9J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ9J, oldest first.
- Straup, Newton F IN2006-04-07 → cancelled 2014-05-22
- Knepple, James E WI2026-03-17 active