Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ7LAS callsign genealogy
Currently held by Mathis IV, Fred 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 KJ7LAS's current licensee, walking backwards.
- MATHIS IV, FRED DUTgranted 2019-12-24cancelled 2020-01-18
Successor callsigns
Callsigns held now by people who previously held KJ7LAS.
- MATHIS IV, FRED DUTgranted 2019-12-24cancelled 2020-01-18
All historical holders
Every license row we've seen with the callsign KJ7LAS, oldest first.
- MATHIS IV, FRED D UT2019-12-06 → cancelled 2019-12-24
- Mathis IV, Fred D UT2020-01-18 active