Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N7MJK callsign genealogy
Currently held by Kao, Matthew
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 N7MJK's current licensee, walking backwards.
- Kao, MatthewCAgranted 2017-07-28cancelled 2017-08-18
Successor callsigns
Callsigns held now by people who previously held N7MJK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7MJK, oldest first.
- TRAETTINO, CHRIS M AZ2000-09-22 → cancelled 2011-03-01
- Kao, Matthew CA2017-08-18 active