Confidence: Medium · Source: FCC ULS · As of 2026-09-15
KC1ZZO callsign genealogy
Currently held by Labilloy, Guillaume
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 KC1ZZO's current licensee, walking backwards.
- Labilloy, GuillaumeMAgranted 2026-07-14cancelled 2026-08-10
Successor callsigns
Callsigns held now by people who previously held KC1ZZO.
No current licensee on record previously held this callsign.