Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9KAT callsign genealogy
Currently held by DUDAK, VLADIMIR J
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 W9KAT's current licensee, walking backwards.
- Taylor, KathrinCAgranted 2011-07-22cancelled 2011-08-16
Successor callsigns
Callsigns held now by people who previously held W9KAT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9KAT, oldest first.
- DUDAK, VLADIMIR J IL1998-12-04 → cancelled 2010-12-07
- Gray, Kate CA2022-08-03 active