K4DUK
Active1x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderDucksworth, Frederic
License ClassGeneral
Min. Class RequiredGeneral
LocationLake City, FL
Grant DateAug 11, 2026
Expiration DateAug 11, 2036
K4DUK is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Ducksworth, Frederic in Lake City, FL. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by Ducksworth, Frederic on Jul 24, 2026. K4DUK has 9 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -.. ..- -.-
CW Weight: 31 units(Moderate)
Voice Phonetics
Kilo Four Delta Uniform Kilo
Readability: 7.5/10(High readability)
License History
- Vanity Callsign GrantedAug 11, 2026
- License IssuedAug 11, 2026
- License ExpiredJul 14, 2026
- License RenewedApr 26, 2014
- Administrative Update AppliedOct 13, 2005
- License ModifiedNov 22, 2004
- Administrative Update AppliedJul 16, 2004
- License IssuedJul 13, 2004
- Vanity Callsign GrantedJul 13, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.