Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9UJ callsign genealogy
Currently held by KARPICKE, JOHN A
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 KD9UJ's current licensee, walking backwards.
- KARPICKE, JOHN AINgranted 2020-01-24
Successor callsigns
Callsigns held now by people who previously held KD9UJ.
- KARPICKE, JOHN AINgranted 2020-01-24