Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KG4FIO callsign genealogy
Currently held by BREYER, ROBERT C
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 KG4FIO'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 KG4FIO.
- Breyer, Robert CINgranted 2010-08-28cancelled 2022-11-01