Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4JOE callsign genealogy
Currently held by Jankowski Jr, Joseph 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 KK4JOE's current licensee, walking backwards.
- Jankowski Jr, Joseph JFLgranted 2025-01-22cancelled 2025-04-01
Successor callsigns
Callsigns held now by people who previously held KK4JOE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KK4JOE, oldest first.
- SMYTH, JANET J SC2012-05-25 → cancelled 2024-05-29
- Jankowski Jr, Joseph J FL2025-04-01 active