Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4OKW callsign genealogy
Currently held by Kopacko, Jason M
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 KJ4OKW'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 KJ4OKW.
- Kopacko, Jason MTNgranted 2019-07-16