Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7JRJ callsign genealogy
Currently held by JAKOUBEK JR, JOHN R
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 K7JRJ's current licensee, walking backwards.
- RAYMOND, JON RMTgranted 2020-04-14cancelled 2020-12-18
Successor callsigns
Callsigns held now by people who previously held K7JRJ.
- JAKOUBEK JR, JOHN RWAgranted 2016-11-04
All historical holders
Every license row we've seen with the callsign K7JRJ, oldest first.
- JAKOUBEK JR, JOHN R WA2009-04-25 → cancelled 2016-11-04
- RAYMOND, JON R MT2020-12-18 active