KR4MDM
Active2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderMartens, Mark D
License ClassGeneral
Min. Class RequiredTechnician
LocationFort Myers, FL
Grant DateJun 21, 2025
Expiration DateJun 21, 2035
KR4MDM is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Martens, Mark D in Fort Myers, FL. 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 Martens, Mark D on Jun 2, 2025. KR4MDM has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .-. ....- -- -.. --
CW Weight: 36 units(Moderate)
Voice Phonetics
Kilo Romeo Four Mike Delta Mike
Readability: 8/10(High readability)
License History
- License ModifiedNov 19, 2025
- License IssuedJun 21, 2025
- Vanity Callsign GrantedJun 21, 2025
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Martens, Mark DFiled Jun 2, 2025Not awardedFCC ↗