Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF4YO callsign genealogy
Currently held by YOUNGER, COLE 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 KF4YO's current licensee, walking backwards.
- KB4CWSno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KF4YO.
- YOUNGER, COLE AKYgranted 2022-10-06