W4RJJ
Active1x3District 4
Competitive callsign — 5 applications filed with the FCC.
License HolderLee, Seung Joo
License ClassTechnician
Min. Class RequiredGeneral
LocationDaytona Beach, FL
Grant DateMar 7, 2026
Expiration DateMay 28, 2036
W4RJJ is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Lee, Seung Joo in Daytona Beach, FL. This callsign has attracted significant interest in the amateur radio community, with 5 vanity applications filed with the FCC. The most recent was submitted by Jackson, Robert O on May 10, 2016. W4RJJ has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
.-- ....- .-. .--- .---
CW Weight: 39 units(Moderate)
Voice Phonetics
Whiskey Four Romeo Juliet Juliet
Readability: 6.5/10(Good readability)
License History
- License RenewedMar 7, 2026
- License ModifiedMar 30, 2017
- License ModifiedJul 13, 2016
- License IssuedMay 28, 2016
- Vanity Callsign GrantedMay 28, 2016
- License ExpiredAug 8, 2006
Vanity Application Activity
Competing applications filed with the FCC for this callsign.