Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0WJK callsign genealogy
Currently held by Simacek, Henry A
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 K0WJK's current licensee, walking backwards.
- Romuld, Joseph JMNgranted 2016-02-18cancelled 2016-03-08
Successor callsigns
Callsigns held now by people who previously held K0WJK.
- ROMULD, JOSEPH JMNgranted 2023-08-18
All historical holders
Every license row we've seen with the callsign K0WJK, oldest first.
- Simacek, Henry A MN2002-03-01 → cancelled 2014-03-04
- Romuld, Joseph J MN2016-03-08 → cancelled 2023-08-18