Confidence: Medium · Source: FCC ULS · As of 2026-09-15
KK4YOI callsign genealogy
Currently held by Florida Hospital Flagler ARC
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 KK4YOI'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 KK4YOI.
- W4FHFexpiredFlorida Hospital Flagler ARCFLgranted 2014-04-08cancelled 2026-04-09