Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4YBI callsign genealogy
Currently held by COOK, CHARLES M
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 KK4YBI'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 KK4YBI.
- COOK, CHARLES MNCgranted 2014-08-30cancelled 2026-09-03