Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK6DUF callsign genealogy
Currently held by Siess, Matthew 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 KK6DUF'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 KK6DUF.
- Siess, Matthew APAgranted 2013-06-25cancelled 2025-06-26