Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC3YFO callsign genealogy
Currently held by Janczak, Joseph M
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 KC3YFO's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KC3YFO.
- Janczak, Joseph MPAgranted 2024-01-17