Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KV4QJ callsign genealogy
Currently held by Vlasak, Mark C
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 KV4QJ's current licensee, walking backwards.
- Vlasak, Mark CTNgranted 2012-10-12cancelled 2013-08-16
Successor callsigns
Callsigns held now by people who previously held KV4QJ.
No current licensee on record previously held this callsign.