Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4AFR callsign genealogy
Currently held by Cardwell, Amy 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 KO4AFR's current licensee, walking backwards.
- Campbell, James DGAgranted 2021-02-16cancelled 2022-02-15
Successor callsigns
Callsigns held now by people who previously held KO4AFR.
- Cardwell, Amy RFLgranted 2020-01-03
All historical holders
Every license row we've seen with the callsign KO4AFR, oldest first.
- Cardwell, Amy R FL2019-11-21 → cancelled 2020-01-03
- Campbell, JIM D GA2022-02-15 active