Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4US callsign genealogy
Currently held by BROWN, BILL 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 KO4US's current licensee, walking backwards.
- Burnette, Robert DGAgranted 2015-03-23cancelled 2024-09-28
Successor callsigns
Callsigns held now by people who previously held KO4US.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO4US, oldest first.
- BROWN, BILL F TN2002-01-03 → cancelled 2014-04-01
- Burnette, Robert D GA2024-09-28 active