Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6IVR callsign genealogy
Currently held by Isterin, Sergey
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 K6IVR's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K6IVR.
No current licensee on record previously held this callsign.