Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4FSI callsign genealogy
Currently held by HAMILTON, DENNIS 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 W4FSI's current licensee, walking backwards.
- HAMILTON, DENNIS MFLgranted 2003-12-10cancelled 2012-04-24
Successor callsigns
Callsigns held now by people who previously held W4FSI.
No current licensee on record previously held this callsign.