Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WN3OSI callsign genealogy
Currently held by Richards, Elizabeth 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 WN3OSI's current licensee, walking backwards.
- Richards, Elizabeth ANVgranted 2024-09-24cancelled 2024-11-14
Successor callsigns
Callsigns held now by people who previously held WN3OSI.
- KOSS, DAVID MPAgranted 2022-06-03
All historical holders
Every license row we've seen with the callsign WN3OSI, oldest first.
- KOSS, DAVID M PA2022-02-01 → cancelled 2022-06-03
- Richards, Elizabeth A NV2024-11-14 active