Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ7JK callsign genealogy
Currently held by Coelho, Matthew J
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 KJ7JK's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KJ7JK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ7JK, oldest first.
- Cohen, Robert L OR2006-06-17 → cancelled 2018-06-19
- Coelho, Matthew J AZ2021-06-22 active