Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD0SBL callsign genealogy
Currently held by Knudson, Brett 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 KD0SBL'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 KD0SBL.
- Knudson, Brett ASDgranted 2022-11-22