KR4ETM
Active2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderCastillo, Ruben
License ClassTechnician
Min. Class RequiredTechnician
LocationMiami, FL
Grant DateJun 24, 2025
Expiration DateJun 24, 2035
KR4ETM is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Castillo, Ruben in Miami, 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 Wheeler, Seth on Jul 18, 2025. KR4ETM has 2 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .-. ....- . - --
CW Weight: 29 units(Light (fast to send))
Voice Phonetics
Kilo Romeo Four Echo Tango Mike
Readability: 7.5/10(High readability)
License History
- System-Generated GrantJun 24, 2025
- License IssuedJun 24, 2025
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Wheeler, SethFiled Jul 18, 2025Not awardedFCC ↗