W4DTZ
Available1x3District 4
Competitive callsign — 5 applications filed with the FCC.
License HolderOlsten, Robert E
License ClassGeneral
Min. Class RequiredGeneral
LocationSanta Rosa, CA
Grant DateMay 28, 2003
Expiration DateMay 28, 2013
Cancellation DateMay 29, 2015
Available for ApplicationsMay 29, 2015
W4DTZ is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Olsten, Robert E in Santa Rosa, CA. This callsign has attracted significant interest in the amateur radio community, with 5 vanity applications filed with the FCC. The most recent was submitted by BARRIONUEVO, WALTER C on Aug 26, 2026. W4DTZ has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
.-- ....- -.. - --..
CW Weight: 30 units(Light (fast to send))
Voice Phonetics
Whiskey Four Delta Tango Zulu
Readability: 8/10(High readability)
This callsign is available now
Requires General license or higher to apply for this callsign format (1x3).
License History
- License ExpiredMay 29, 2015
- License IssuedMay 28, 2003
- Vanity Callsign GrantedMay 28, 2003
Vanity Application Activity
Competing applications filed with the FCC for this callsign.