Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD6TD callsign genealogy
Currently held by Diacakis, Athanassios
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 AD6TD's current licensee, walking backwards.
- Diacakis, AthanassiosCAgranted 2016-09-27cancelled 2016-10-15
Successor callsigns
Callsigns held now by people who previously held AD6TD.
- RATAJACK, MARK TAZgranted 2022-04-06
All historical holders
Every license row we've seen with the callsign AD6TD, oldest first.
- Ratajack, Mark T TX2000-10-03 → cancelled 2002-06-22
- Diacakis, Athanassios CA2026-08-11 active