W4ZSU
Available1x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderLEDDIN, KAREN B
License ClassTechnician
Min. Class RequiredGeneral
LocationMELBOURNE, FL
Grant DateOct 5, 1993
Expiration DateOct 5, 2003
Cancellation DateOct 23, 2000
Available for ApplicationsOct 24, 2002
W4ZSU is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by LEDDIN, KAREN B in MELBOURNE, FL. 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 Uribe, Zack on Dec 29, 2025. W4ZSU has 1 recorded FCC license history event.
CW & Voice Analysis
Morse Code
.-- ....- --.. ... ..-
CW Weight: 30 units(Light (fast to send))
Voice Phonetics
Whiskey Four Zulu Sierra Uniform
Readability: 7/10(Good readability)
This callsign is available now
Requires General license or higher to apply for this callsign format (1x3).
License History
- License CanceledOct 28, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Uribe, ZackFiled Dec 29, 2025Not awardedFCC ↗