Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0RYD callsign genealogy
Currently held by Ulvestad, Robert A
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 KC0RYD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KC0RYD.
No current licensee on record previously held this callsign.