Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD7SDF callsign genealogy
Currently held by Clauson, Mattie C
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 KD7SDF's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KD7SDF.
- Clauson, Mattie CORgranted 2002-07-16cancelled 2004-01-20