Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4FDU callsign genealogy
Currently held by SUSINNO, MARCUS 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 W4FDU's current licensee, walking backwards.
- SUSINNO, MARCUS ASCgranted 2003-04-24cancelled 2003-06-27
Successor callsigns
Callsigns held now by people who previously held W4FDU.
No current licensee on record previously held this callsign.