Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0ZZZ callsign genealogy
Currently held by Sullivan, Robert T
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 KC0ZZZ's current licensee, walking backwards.
- Sullivan, Robert TCOgranted 2006-05-11cancelled 2006-08-11
Successor callsigns
Callsigns held now by people who previously held KC0ZZZ.
No current licensee on record previously held this callsign.