KM4SON
Active2x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderBarker, Donald J
License ClassAmateur Extra
Min. Class RequiredTechnician
LocationMerritt Island, FL
Grant DateMar 17, 2026
Expiration DateMar 21, 2036
KM4SON is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Barker, Donald J in Merritt Island, 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 Kalman Sr, Earl K on Jan 26, 2022. KM4SON has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -- ....- ... --- -.
CW Weight: 36 units(Moderate)
Voice Phonetics
Kilo Mike Four Sierra Oscar November
Readability: 7/10(Good readability)
License History
- License RenewedMar 17, 2026
- License ModifiedApr 14, 2016
- License ModifiedApr 4, 2016
- System-Generated GrantMar 21, 2016
- License IssuedMar 21, 2016
Vanity Application Activity
Competing applications filed with the FCC for this callsign.