Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA9OOR callsign genealogy
Currently held by Wondolkowski, Donald M
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 KA9OOR's current licensee, walking backwards.
- Wondolkowski, Donald MILgranted 2002-09-26cancelled 2002-11-05
Successor callsigns
Callsigns held now by people who previously held KA9OOR.
- WONDOLKOWSKI Mr, DONALD MILgranted 2026-06-04
All historical holders
Every license row we've seen with the callsign KA9OOR, oldest first.
- WONDOLKOWSKI, DONALD M IL1988-02-23 → cancelled 2000-02-24
- Wondolkowski, Donald M IL2002-11-05 → cancelled 2005-02-25