Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4KRK callsign genealogy
Currently held by Kaucher, Karl 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 KK4KRK's current licensee, walking backwards.
- Kaucher, Karl RKYgranted 2009-04-02cancelled 2016-03-29
Successor callsigns
Callsigns held now by people who previously held KK4KRK.
- Upchurch, James RKYgranted 2022-09-07
All historical holders
Every license row we've seen with the callsign KK4KRK, oldest first.
- Upchurch, James R KY2012-07-26 → cancelled 2012-11-24
- Kaucher, Karl R KY2016-03-29 active