W4WMB
Active1x3District 4
Competitive callsign — 9 applications filed with the FCC.
License HolderBosworth, Michael L
License ClassTechnician
Min. Class RequiredGeneral
LocationVienna, VA
Grant DateMay 25, 2018
Expiration DateMay 25, 2028
W4WMB is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Bosworth, Michael L in Vienna, VA. This callsign has attracted significant interest in the amateur radio community, with 9 vanity applications filed with the FCC. The most recent was submitted by Burris, William M on Sep 5, 2025. W4WMB has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
.-- ....- .-- -- -...
CW Weight: 33 units(Moderate)
Voice Phonetics
Whiskey Four Whiskey Mike Bravo
Readability: 8.5/10(High readability)
License History
- License IssuedMay 25, 2018
- Vanity Callsign GrantedMay 25, 2018
- License ExpiredMar 10, 2015
- Administrative Update AppliedSep 27, 2006
- License IssuedMar 8, 2003
- Vanity Callsign GrantedMar 8, 2003
Vanity Application Activity
Competing applications filed with the FCC for this callsign.