Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR9K callsign genealogy
Currently held by Willson, Mark D
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 KR9K's current licensee, walking backwards.
- Willson, Mark DILgranted 2019-05-24cancelled 2019-07-16
Successor callsigns
Callsigns held now by people who previously held KR9K.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KR9K, oldest first.
- LANG, ARTHUR L TN2007-06-05 → cancelled 2019-06-06
- Willson, Mark D IL2019-07-16 active