Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0OSU callsign genealogy
Currently held by Beck, Warren G
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 KC0OSU's current licensee, walking backwards.
- METZNER, THOMASKSgranted 2025-02-25cancelled 2025-03-18
Successor callsigns
Callsigns held now by people who previously held KC0OSU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC0OSU, oldest first.
- Beck, Warren G MO2002-12-24 → cancelled 2014-12-25
- METZNER, THOMAS KS2025-03-18 active