Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9KFC callsign genealogy
Currently held by Czerwinski, Kenneth 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 W9KFC's current licensee, walking backwards.
- Czerwinski, Kenneth FILgranted 2019-12-27cancelled 2023-09-12
Successor callsigns
Callsigns held now by people who previously held W9KFC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9KFC, oldest first.
- NEW BERLIN AMATEUR RADIO SOCIETY WI2002-03-29 → cancelled 2014-04-01
- Czerwinski, Kenneth F IL2023-09-12 active