K3SCO
Active1x3District 3
Competitive callsign — 3 applications filed with the FCC.
License HolderOldmixon, Seth C
License ClassGeneral
Min. Class RequiredGeneral
LocationRockville, MD
Grant DateJan 21, 2026
Expiration DateMar 18, 2036
K3SCO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Oldmixon, Seth C in Rockville, MD. 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 Byers, Scott A on Aug 17, 2022. K3SCO has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ...-- ... -.-. ---
CW Weight: 36 units(Moderate)
Voice Phonetics
Kilo Three Sierra Charlie Oscar
Readability: 7.5/10(High readability)
License History
- License RenewedJan 21, 2026
- Administrative Update AppliedFeb 14, 2024
- Administrative Update AppliedApr 29, 2017
- Administrative Update AppliedJun 3, 2016
- License ModifiedMar 21, 2016
- License IssuedMar 18, 2016
- Vanity Callsign GrantedMar 18, 2016
Vanity Application Activity
Competing applications filed with the FCC for this callsign.