Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9UD callsign genealogy
Currently held by LAUK, JAMES 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 KC9UD's current licensee, walking backwards.
- Lauk, James RFLgranted 2020-02-10cancelled 2020-08-08
Successor callsigns
Callsigns held now by people who previously held KC9UD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC9UD, oldest first.
- LAUK, JAMES R IL1993-06-01 → cancelled 2005-06-02
- Lauk, James R FL2020-08-08 active