Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0FS callsign genealogy
Currently held by Urbanic, Matthew S
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 K0FS's current licensee, walking backwards.
- Urbanic, Matthew SALgranted 2021-09-24cancelled 2021-11-20
Successor callsigns
Callsigns held now by people who previously held K0FS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0FS, oldest first.
- Simowitz, Fredric M MO2016-07-13 → cancelled 2019-10-22
- Urbanic, Matthew S AL2021-11-20 active