K6RJU
Active1x3District 6
Competitive callsign — 1 application filed with the FCC.
License HolderUnderwood, Ron J
License ClassTechnician
Min. Class RequiredGeneral
LocationRamona, CA
Grant DateJan 9, 2026
Expiration DateMar 5, 2036
K6RJU is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Underwood, Ron J in Ramona, 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 Underwood, Ron J on Feb 16, 2016. K6RJU has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -.... .-. .--- ..-
CW Weight: 34 units(Moderate)
Voice Phonetics
Kilo Six Romeo Juliet Uniform
Readability: 6.5/10(Good readability)
License History
- License RenewedJan 9, 2026
- License IssuedMar 5, 2016
- Vanity Callsign GrantedMar 5, 2016
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Underwood, Ron JFiled Feb 16, 2016Not awardedFCC ↗