Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9BY callsign genealogy
Currently held by JOHNSON, 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 K9BY's current licensee, walking backwards.
- JOHNSON, BRETT AILgranted 2010-04-20cancelled 2010-06-22
Successor callsigns
Callsigns held now by people who previously held K9BY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9BY, oldest first.
- YOUNG SR, WILLIAM A IL1998-06-03 → cancelled 2010-06-04
- JOHNSON, BRETT A IL2020-05-06 active