Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA0GYZ callsign genealogy
Currently held by Estlund, Russell K
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 KA0GYZ's current licensee, walking backwards.
- Estlund, Jennifer RCOgranted 2026-03-17cancelled 2026-04-04
Successor callsigns
Callsigns held now by people who previously held KA0GYZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA0GYZ, oldest first.
- ESTLUND, JENNIFER R CO2011-10-26 → cancelled 2024-01-23
- Estlund, Russell K CO2026-04-04 active