Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0CYO callsign genealogy
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 N0CYO's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held N0CYO.
- BERNTSEN, WILLIAM BMNgranted 1988-03-15cancelled 2000-03-16