Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI5YYZ callsign genealogy
Currently held by McCowan, John 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 KI5YYZ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KI5YYZ.
No current licensee on record previously held this callsign.