Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB9UBU callsign genealogy
Currently held by Szybist, Andrew 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 WB9UBU's current licensee, walking backwards.
- SZYBIST, KAREN MILgranted 2006-03-07cancelled 2006-05-06
Successor callsigns
Callsigns held now by people who previously held WB9UBU.
- Szybist, Andrew CFLgranted 2024-03-20
All historical holders
Every license row we've seen with the callsign WB9UBU, oldest first.
- Szybist, Andrew C IL1999-06-18 → cancelled 2004-04-17
- SZYBIST, KAREN M FL2026-03-13 active