Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BR callsign genealogy
Currently held by MAC DONALD, WILLIAM J
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 K4BR's current licensee, walking backwards.
- WD4COLcancelledcancelled 1999-04-08
Successor callsigns
Callsigns held now by people who previously held K4BR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4BR, oldest first.
- MAC DONALD, WILLIAM J GA1996-07-31 → cancelled 1998-09-19
- MAC DONALD, JOHN R GA2019-01-31 active