Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9TSO callsign genealogy
Currently held by Perri, M.D.
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 W9TSO's current licensee, walking backwards.
- Perri, Michael DWVgranted 2023-05-05cancelled 2023-05-23
Successor callsigns
Callsigns held now by people who previously held W9TSO.
No current licensee on record previously held this callsign.