Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA3OSI callsign genealogy
Currently held by KOSS, DAVID 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 WA3OSI's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WA3OSI.
No current licensee on record previously held this callsign.