KC4COS
Active2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderStevens, Mark A
License ClassAmateur Extra
Min. Class RequiredTechnician
LocationLebanon, VA
Grant DateAug 15, 2020
Expiration DateAug 15, 2030
KC4COS is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Stevens, Mark A in Lebanon, VA. 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 Stevens, Mark A on Jul 28, 2020. KC4COS has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -.-. ....- -.-. --- ...
CW Weight: 42 units(Heavy (slower to send))
Voice Phonetics
Kilo Charlie Four Charlie Oscar Sierra
Readability: 7/10(Good readability)
License History
- Administrative Update AppliedFeb 27, 2026
- License ModifiedMay 11, 2021
- License ModifiedOct 2, 2020
- License IssuedAug 15, 2020
- Vanity Callsign GrantedAug 15, 2020
- License ExpiredAug 25, 2009
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Stevens, Mark AFiled Jul 28, 2020Not awardedFCC ↗