K4MSM
Active1x3District 4
Competitive callsign — 13 applications filed with the FCC.
License HolderMercer, Matthew S
License ClassTechnician
Min. Class RequiredGeneral
LocationWilson, NC
Grant DateJul 14, 2023
Expiration DateJul 14, 2033
K4MSM is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Mercer, Matthew S in Wilson, NC. This callsign has attracted significant interest in the amateur radio community, with 13 vanity applications filed with the FCC. The most recent was submitted by Mooney, Michael S on Aug 5, 2025. K4MSM has 9 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -- ... --
CW Weight: 29 units(Light (fast to send))
Voice Phonetics
Kilo Four Mike Sierra Mike
Readability: 8.5/10(High readability)
License History
- Vanity Callsign GrantedJul 14, 2023
- License IssuedJul 14, 2023
- License CanceledFeb 26, 2019
- License IssuedJul 21, 2009
- Vanity Callsign GrantedJul 21, 2009
- License CanceledMar 17, 2009
- Administrative Update AppliedMay 28, 2003
- Vanity Callsign GrantedMar 11, 2003
- License IssuedMar 11, 2003
Vanity Application Activity
Competing applications filed with the FCC for this callsign.