Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3YYZ callsign genealogy
Currently held by STACK, WILLIAM O
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 W3YYZ's current licensee, walking backwards.
- STACK, WILLIAM OMDgranted 1998-07-16cancelled 2007-09-22
Successor callsigns
Callsigns held now by people who previously held W3YYZ.
No current licensee on record previously held this callsign.