Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC0OBI callsign genealogy
Currently held by Cotty, Michael L
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 KC0OBI's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KC0OBI.
No current licensee on record previously held this callsign.