Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3SI callsign genealogy
Currently held by HAYDEN SR, CHARLES G
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 W3SI's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W3SI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3SI, oldest first.
- HAYDEN SR, CHARLES G MD2008-02-16 → cancelled 2020-04-29
- CLARK, WILLIAM F FL2020-05-19 active