Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0SG callsign genealogy
Currently held by HIETALA, ALEXANDER 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 K0SG's current licensee, walking backwards.
- Hietala, Vincent MNMgranted 2023-04-14cancelled 2023-05-02
Successor callsigns
Callsigns held now by people who previously held K0SG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0SG, oldest first.
- HIETALA, ALEXANDER W AZ2020-06-17 → cancelled 2022-05-24
- Hietala, Vincent M NM2023-05-02 active