Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC5ACB callsign genealogy
Currently held by THRASH, MARK E
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 KC5ACB's current licensee, walking backwards.
- George III, John FLAgranted 2020-10-01cancelled 2020-10-31
Successor callsigns
Callsigns held now by people who previously held KC5ACB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC5ACB, oldest first.
- THRASH, MARK E AR1993-06-15 → cancelled 2005-06-16
- George III, John F LA2020-10-31 active