K5MSR
Active1x3District 5
Competitive callsign — 8 applications filed with the FCC.
License HolderRiddleberger, Mark S
License ClassTechnician
Min. Class RequiredGeneral
LocationGotha, FL
Grant DateSep 30, 2025
Expiration DateSep 30, 2035
K5MSR is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Riddleberger, Mark S in Gotha, FL. This callsign has attracted significant interest in the amateur radio community, with 8 vanity applications filed with the FCC. The most recent was submitted by Riddleberger, Mark S on Sep 10, 2025. K5MSR has 9 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ..... -- ... .-.
CW Weight: 26 units(Light (fast to send))
Voice Phonetics
Kilo Five Mike Sierra Romeo
Readability: 7.5/10(High readability)
License History
- Vanity Callsign GrantedSep 30, 2025
- License IssuedSep 30, 2025
- License ExpiredFeb 4, 2025
- License IssuedFeb 1, 2013
- Vanity Callsign GrantedFeb 1, 2013
- Internal Correction AppliedJul 26, 2012
- Internal Correction AppliedJul 26, 2012
- Vanity Callsign GrantedApr 1, 2008
- License IssuedApr 1, 2008
Vanity Application Activity
Competing applications filed with the FCC for this callsign.