K4SDM
Active1x3District 4
Competitive callsign — 7 applications filed with the FCC.
License HolderLarks, Darrel H
License ClassTechnician
Min. Class RequiredGeneral
LocationChula Vista, CA
Grant DateJun 13, 2020
Expiration DateJun 13, 2030
K4SDM is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Larks, Darrel H in Chula Vista, CA. This callsign has attracted significant interest in the amateur radio community, with 7 vanity applications filed with the FCC. The most recent was submitted by Morin, Seth D on Aug 7, 2026. K4SDM has 8 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- ... -.. --
CW Weight: 28 units(Light (fast to send))
Voice Phonetics
Kilo Four Sierra Delta Mike
Readability: 8/10(High readability)
License History
- License ModifiedOct 18, 2021
- License IssuedJun 13, 2020
- Vanity Callsign GrantedJun 13, 2020
- License CanceledMar 1, 2011
- License ModifiedFeb 8, 2011
- License ModifiedJan 6, 2011
- License IssuedJan 4, 2011
- Vanity Callsign GrantedJan 4, 2011
Vanity Application Activity
Competing applications filed with the FCC for this callsign.