Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KG4EFI callsign genealogy
Currently held by FESSENDEN AMATEUR RADIO SOCIETY
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 KG4EFI'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 KG4EFI.
- K4OBXactiveFESSENDEN AMATEUR RADIO SOCIETYNCgranted 2019-12-23