Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9FSA callsign genealogy
Currently held by OLSZEWSKI, ROBERT 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 WA9FSA's current licensee, walking backwards.
- OLSZEWSKI, ROBERT CWIgranted 2016-01-28cancelled 2016-02-23
Successor callsigns
Callsigns held now by people who previously held WA9FSA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA9FSA, oldest first.
- OLSZEWSKI, ROBERT C IL1988-05-24 → cancelled 2000-05-25
- OLSZEWSKI, ROBERT C WI2016-02-23 active