Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9SIU callsign genealogy
Currently held by Bleyer, Knute R
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 K9SIU's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K9SIU.
No current licensee on record previously held this callsign.