Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9OJS callsign genealogy
Currently held by WILBRANDT JR, ROBERT 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 WA9OJS's current licensee, walking backwards.
- WILBRANDT JR, ROBERT AILgranted 2013-05-24cancelled 2013-08-23
Successor callsigns
Callsigns held now by people who previously held WA9OJS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA9OJS, oldest first.
- Wilbrandt, Robert A IL2004-04-19 → cancelled 2011-09-01
- WILBRANDT JR, ROBERT A FL2025-07-01 active