Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1RSO callsign genealogy
Currently held by Olszewski, Robert S
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 K1RSO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K1RSO.
No current licensee on record previously held this callsign.