Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5FDU callsign genealogy
Currently held by COUSIN, WILLIAM C
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 W5FDU's current licensee, walking backwards.
- COUSIN, WILLIAM COKgranted 2005-11-08cancelled 2008-03-11
Successor callsigns
Callsigns held now by people who previously held W5FDU.
No current licensee on record previously held this callsign.