Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4BYX callsign genealogy
Currently held by ROGALSKI, RUSSELL
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 KJ4BYX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KJ4BYX.
- ROGALSKI, RUSSELLNCgranted 2017-05-23cancelled 2021-02-09
All historical holders
Every license row we've seen with the callsign KJ4BYX, oldest first.
- ROGALSKI, RUSSELL NC2008-02-14 → cancelled 2017-05-23
- ROGALSKI, RUSSELL NC2021-02-09 active