Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K3USA callsign genealogy
Currently held by GYSI AMATEUR GROUP USA
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 K3USA's current licensee, walking backwards.
- KB0SSQcancelledGYSI AMATEUR GROUP USAILgranted 2015-02-24cancelled 2015-04-04
Successor callsigns
Callsigns held now by people who previously held K3USA.
- APPLEGATE, DANIEL JOKgranted 2023-01-31
All historical holders
Every license row we've seen with the callsign K3USA, oldest first.
- APPLEGATE, DANIEL J OK2006-10-17 → cancelled 2013-02-20
- GYSI AMATEUR GROUP USA IL2025-03-29 active