W4OSC
Active1x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderALLEN, MARK S
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationSAN DIEGO, CA
Grant DateMar 3, 2020
Expiration DateMay 16, 2030
W4OSC is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by ALLEN, MARK S in SAN DIEGO, CA. 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 Bozard, Russell B on Apr 28, 2000. W4OSC has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
.-- ....- --- ... -.-.
CW Weight: 34 units(Moderate)
Voice Phonetics
Whiskey Four Oscar Sierra Charlie
Readability: 7.5/10(High readability)
License History
- License RenewedMar 3, 2020
- License RenewedMar 6, 2010
- License ModifiedApr 26, 2002
- License ModifiedMar 12, 2001
- License IssuedMay 16, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.