W4OSO
Available1x3District 4
Competitive callsign — 4 applications filed with the FCC.
Min. Class RequiredGeneral
Cancellation DateApr 23, 1998
Available for ApplicationsApr 24, 2000
W4OSO is a highly sought-after 1x3 format amateur radio callsign. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Aubut, Michael P on Aug 27, 2026.
CW & Voice Analysis
Morse Code
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CW Weight: 35 units(Moderate)
Voice Phonetics
Whiskey Four Oscar Sierra Oscar
Readability: 7.5/10(High readability)
This callsign is available now
Requires General license or higher to apply for this callsign format (1x3).
Vanity Application Activity
Competing applications filed with the FCC for this callsign.