Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4LZO callsign genealogy
Currently held by Cho, Leroy D
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 KJ4LZO'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 KJ4LZO.
- Cho, Leroy DTNgranted 2010-05-29cancelled 2022-06-01