KF4YIO
Active2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderSINISI, STUART M
License ClassTechnician
Min. Class RequiredTechnician
LocationHAMMOND, IN
Grant DateJan 21, 2026
Expiration DateMar 8, 2036
KF4YIO is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by SINISI, STUART M in HAMMOND, IN. This callsign has attracted significant interest in the amateur radio community, with 1 vanity application filed with the FCC. The most recent was submitted by Daugherty, Brandon D on Feb 19, 2016. KF4YIO has 8 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ..-. ....- -.-- .. ---
CW Weight: 41 units(Heavy (slower to send))
Voice Phonetics
Kilo Foxtrot Four Yankee India Oscar
Readability: 7/10(Good readability)
License History
- License RenewedJan 21, 2026
- License ModifiedNov 18, 2020
- License ModifiedJul 24, 2019
- Vanity Callsign GrantedMar 8, 2016
- License IssuedMar 8, 2016
- License ExpiredMay 8, 2010
- Tax ID (TIN) AddedFeb 22, 2002
- License ModifiedFeb 22, 2002
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Daugherty, Brandon DFiled Feb 19, 2016Not awardedFCC ↗