Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4JON callsign genealogy
Currently held by OPRANDY, 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 KJ4JON's current licensee, walking backwards.
- OPRANDY, JOHN JFLgranted 2013-06-29cancelled 2020-03-03
Successor callsigns
Callsigns held now by people who previously held KJ4JON.
- OPRANDY, JOHN JFLgranted 2013-06-29cancelled 2020-03-03
All historical holders
Every license row we've seen with the callsign KJ4JON, oldest first.
- OPRANDY, JOHN J FL2008-05-20 → cancelled 2013-06-29
- OPRANDY, JOHN J FL2020-03-03 active