K0JZZ
Active1x3District 0
Competitive callsign — 5 applications filed with the FCC.
License HolderZIMMER, JERROLD F
License ClassGeneral
Min. Class RequiredGeneral
LocationBOULDER, CO
Grant DateAug 1, 2026
Expiration DateSep 24, 2036
K0JZZ is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by ZIMMER, JERROLD F in BOULDER, CO. This callsign has attracted significant interest in the amateur radio community, with 5 vanity applications filed with the FCC. The most recent was submitted by Zimmer, Jerrold F on Sep 6, 2016. K0JZZ has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ----- .--- --.. --..
CW Weight: 48 units(Heavy (slower to send))
Voice Phonetics
Kilo Zero Juliet Zulu Zulu
Readability: 7/10(Good readability)
License History
- Administrative Update AppliedAug 3, 2026
- License RenewedAug 1, 2026
- License IssuedSep 24, 2016
- Vanity Callsign GrantedSep 24, 2016
- License ExpiredJun 22, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.