Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4T callsign genealogy
Currently held by BORKOSKI, ROBERT 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 KD4T's current licensee, walking backwards.
- ARIAIL, FREDERICK PGAgranted 2003-05-28cancelled 2004-03-27
Successor callsigns
Callsigns held now by people who previously held KD4T.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4T, oldest first.
- BORKOSKI, ROBERT E FL1993-11-23 → cancelled 1995-01-19
- ARIAIL, FREDERICK P GA2024-01-20 active