KN4SDR
Available2x3District 4
Competitive callsign — 3 applications filed with the FCC.
License HolderWILSON, MICHAEL D
License ClassGeneral
Min. Class RequiredTechnician
LocationTAMPA, FL
Grant DateFeb 8, 2019
Expiration DateFeb 8, 2029
Cancellation DateMar 5, 2019
Available for ApplicationsMar 6, 2021
KN4SDR is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by WILSON, MICHAEL D in TAMPA, FL. This callsign has attracted significant interest in the amateur radio community, with 3 vanity applications filed with the FCC. The most recent was submitted by Harrison, Marshall K on Aug 12, 2026. KN4SDR has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -. ....- ... -.. .-.
CW Weight: 31 units(Moderate)
Voice Phonetics
Kilo November Four Sierra Delta Romeo
Readability: 6/10(Good readability)
This callsign is available now
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- License CanceledMar 5, 2019
- System-Generated GrantFeb 8, 2019
- License IssuedFeb 8, 2019
Vanity Application Activity
Competing applications filed with the FCC for this callsign.