Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4J callsign genealogy
Currently held by TRESTRAIL, FREDERICK
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 KJ4J's current licensee, walking backwards.
- Menendez, James BVAgranted 2001-10-17cancelled 2002-04-16
Successor callsigns
Callsigns held now by people who previously held KJ4J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ4J, oldest first.
- TRESTRAIL, FREDERICK VA1995-02-27 → cancelled 2002-03-07
- MENENDEZ, JAMES B VA2022-01-18 active