Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0STU callsign genealogy
Currently held by Berens, Stuart
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 K0STU's current licensee, walking backwards.
- Berens, StuartCOgranted 2010-02-11cancelled 2010-03-09
Successor callsigns
Callsigns held now by people who previously held K0STU.
No current licensee on record previously held this callsign.