Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4BR callsign genealogy
Currently held by DIGGINS III, MARTIN
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 KO4BR's current licensee, walking backwards.
- Kruszewski SR, Buck RALgranted 2022-02-14cancelled 2025-01-25
Successor callsigns
Callsigns held now by people who previously held KO4BR.
All historical holders
Every license row we've seen with the callsign KO4BR, oldest first.
- DIGGINS III, MARTIN SC2001-06-09 → cancelled 2003-12-05
- Kruszewski SR, Buck R AL2025-01-25 → cancelled 2026-06-19