Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI0OU callsign genealogy
Currently held by ROUDEBUSH, JOHN C
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 KI0OU'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 KI0OU.
- ROUDEBUSH, JOHN CKSgranted 2014-01-23cancelled 2026-03-06