Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KA1WIZ callsign genealogy
Currently held by Wilczynski, Robert 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 KA1WIZ's current licensee, walking backwards.
- Wilczynski, Robert JMAgranted 2016-03-08cancelled 2016-03-26
Successor callsigns
Callsigns held now by people who previously held KA1WIZ.
- Wilczynski, Robert JTXgranted 2017-03-14
All historical holders
Every license row we've seen with the callsign KA1WIZ, oldest first.
- KNELLER, BRUCE W MA1990-09-04 → cancelled 2002-09-05
- Wilczynski, Robert J MA2016-03-26 → cancelled 2017-03-14