Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI4ADT callsign genealogy
Currently held by Ruszczyk, Paul A
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 KI4ADT's current licensee, walking backwards.
- Ruszczyk, Paul AGAgranted 2015-07-10cancelled 2015-07-31
Successor callsigns
Callsigns held now by people who previously held KI4ADT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KI4ADT, oldest first.
- Ruszczyk, Paul A GA2003-05-08 → cancelled 2015-05-09
- Ruszczyk, Paul A GA2025-06-04 active