KR4MJO
Active2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderBuehler, Brian M
License ClassTechnician
Min. Class RequiredTechnician
LocationValencia, CA
Grant DateMay 20, 2026
Expiration DateMay 20, 2036
KR4MJO is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Buehler, Brian M in Valencia, CA. 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 OLAFSON, MICHAEL J on Aug 5, 2024. KR4MJO has 2 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .-. ....- -- .--- ---
CW Weight: 44 units(Heavy (slower to send))
Voice Phonetics
Kilo Romeo Four Mike Juliet Oscar
Readability: 7/10(Good readability)
License History
- System-Generated GrantMay 20, 2026
- License IssuedMay 20, 2026
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- OLAFSON, MICHAEL JFiled Aug 5, 2024Not awardedFCC ↗