Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0SDS callsign genealogy
Currently held by Serio, Samuel 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 W0SDS's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W0SDS.
No current licensee on record previously held this callsign.