Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1SDX callsign genealogy
Currently held by Kustov, Vladimir M
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 K1SDX's current licensee, walking backwards.
- Kustov, Vladimir MCTgranted 2015-09-10cancelled 2015-10-20
Successor callsigns
Callsigns held now by people who previously held K1SDX.
No current licensee on record previously held this callsign.