Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4UJO callsign genealogy
Currently held by Maistryk, Wolodymyr
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 W4UJO's current licensee, walking backwards.
- MAISTRYK, WOLODYMYRALgranted 2011-06-24cancelled 2012-06-02
Successor callsigns
Callsigns held now by people who previously held W4UJO.
- Maistryk, WolodymyrCOgranted 2024-06-26