Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4TLJ callsign genealogy
Currently held by Harlan County High School ARC
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 KO4TLJ'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 KO4TLJ.
- KY4HCSactiveHarlan County High School ARCKYgranted 2021-10-22