Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4RF callsign genealogy
Currently held by KOPENEC, FRANK 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 AI4RF's current licensee, walking backwards.
- KOPENEC, FRANK JNCgranted 1999-06-16cancelled 2006-09-05
Successor callsigns
Callsigns held now by people who previously held AI4RF.
No current licensee on record previously held this callsign.