Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK7KO callsign genealogy
Currently held by Ostrovskiy, Konstantin
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 KK7KO's current licensee, walking backwards.
- Ostrovskiy, KonstantinWAgranted 2022-05-17cancelled 2025-04-08
Successor callsigns
Callsigns held now by people who previously held KK7KO.
- MILLER, TERRY WWAgranted 1997-11-13cancelled 2006-06-24
All historical holders
Every license row we've seen with the callsign KK7KO, oldest first.
- MILLER, TERRY W TX1997-11-13 → cancelled 2005-04-07
- Ostrovskiy, Konstantin WA2025-04-08 active