Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF9DUR callsign genealogy
Currently held by Clausen, Lockhart N
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 KF9DUR's current licensee, walking backwards.
- Clausen, James WINgranted 2021-08-17cancelled 2021-09-08
Successor callsigns
Callsigns held now by people who previously held KF9DUR.
No current licensee on record previously held this callsign.