Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1FBI callsign genealogy
Currently held by ZVONEK, JOHN F
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 K1FBI's current licensee, walking backwards.
- ZVONEK, JOHN Fcancelled 1999-08-04
Successor callsigns
Callsigns held now by people who previously held K1FBI.
No current licensee on record previously held this callsign.