Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ4KAT callsign genealogy
Currently held by MASON, ANDREW W
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 KJ4KAT's current licensee, walking backwards.
- Wise, Kathryn MGAgranted 2022-02-07cancelled 2022-04-23
Successor callsigns
Callsigns held now by people who previously held KJ4KAT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ4KAT, oldest first.
- MASON, ANDREW W AL2009-03-05 → cancelled 2021-03-06
- Wise, Kathryn M AL2022-04-23 active