KK4JON
Active2x3District 4
Competitive callsign — 4 applications filed with the FCC.
License HolderCampbell, Robert B
License ClassAmateur Extra
Min. Class RequiredTechnician
LocationTucson, AZ
Grant DateOct 22, 2021
Expiration DateOct 22, 2031
KK4JON is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Campbell, Robert B in Tucson, AZ. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Beard, Jonathan J on May 6, 2026. KK4JON has 9 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -.- ....- .--- --- -.
CW Weight: 44 units(Heavy (slower to send))
Voice Phonetics
Kilo Kilo Four Juliet Oscar November
Readability: 6.5/10(Good readability)
License History
- License ModifiedDec 5, 2023
- License ModifiedApr 26, 2022
- License IssuedOct 22, 2021
- Vanity Callsign GrantedOct 22, 2021
- License ExpiredApr 4, 2019
- License ModifiedJul 30, 2008
- License ModifiedApr 12, 2007
- License IssuedApr 3, 2007
- Vanity Callsign GrantedApr 3, 2007
Vanity Application Activity
Competing applications filed with the FCC for this callsign.