Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA9MAC callsign genealogy
Currently held by KASTEN, GORDON R
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 KA9MAC's current licensee, walking backwards.
- CARTER, MATTHEWINgranted 2023-04-12cancelled 2024-10-26
Successor callsigns
Callsigns held now by people who previously held KA9MAC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA9MAC, oldest first.
- KASTEN, GORDON R IL2007-05-17 → cancelled 2019-07-23
- CARTER, MATTHEW IN2024-10-26 active