Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4QMY callsign genealogy
Currently held by Treftz, Kristjan K
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 KJ4QMY'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 KJ4QMY.
- Treftz, Kristjan KFLgranted 2012-10-05cancelled 2024-10-08