WD4SLM
Active2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderKrone, Douglas E
License ClassGeneral
Min. Class RequiredTechnician
LocationPalouse, WA
Grant DateJan 21, 2026
Expiration DateFeb 6, 2036
WD4SLM is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Krone, Douglas E in Palouse, WA. 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 Krone, Douglas E on Jan 19, 2016. WD4SLM has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
.-- -.. ....- ... .-.. --
CW Weight: 34 units(Moderate)
Voice Phonetics
Whiskey Delta Four Sierra Lima Mike
Readability: 7.5/10(High readability)
License History
- License RenewedJan 21, 2026
- License IssuedFeb 6, 2016
- Vanity Callsign GrantedFeb 6, 2016
- License ExpiredNov 22, 2008
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Krone, Douglas EFiled Jan 19, 2016Not awardedFCC ↗