Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1EFJ callsign genealogy
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 K1EFJ'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 K1EFJ.
- OLSEN, LEROY SCTgranted 1993-05-04cancelled 2005-05-05