K4RFU
Active1x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderThomas, John B
License ClassGeneral
Min. Class RequiredGeneral
LocationLake Butler, FL
Grant DateSep 27, 2025
Expiration DateSep 27, 2035
K4RFU is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Thomas, John B in Lake Butler, 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 Thomas, John B on Sep 9, 2025. K4RFU has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- .-. ..-. ..-
CW Weight: 30 units(Light (fast to send))
Voice Phonetics
Kilo Four Romeo Foxtrot Uniform
Readability: 7/10(Good readability)
License History
- License ModifiedNov 20, 2025
- License IssuedSep 27, 2025
- Vanity Callsign GrantedSep 27, 2025
Vanity Application Activity
Competing applications filed with the FCC for this callsign.