Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN4BDR callsign genealogy
Currently held by Osbon, Clayton F
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 KN4BDR'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 KN4BDR.
- Osbon, Clayton FGAgranted 2017-06-02cancelled 2017-08-25