K4JTZ
Cancelled1x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderHorn, Mark J
License ClassGeneral
Min. Class RequiredGeneral
LocationWINTER GARDEN, FL
Grant DateDec 9, 2025
Cancellation DateOct 10, 2026
Available for ApplicationsOct 11, 2028
K4JTZ is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Horn, Mark J in WINTER GARDEN, FL. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by Horn, Mark J on Sep 26, 2025. K4JTZ has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- .--- - --..
CW Weight: 35 units(Moderate)
Voice Phonetics
Kilo Four Juliet Tango Zulu
Readability: 7.5/10(High readability)
Available Oct 11, 2028 (717 days remaining)
Requires General license or higher to apply for this callsign format (1x3).
License History
- License CanceledOct 10, 2026
- License IssuedDec 9, 2025
- Vanity Callsign GrantedDec 9, 2025
Vanity Application Activity
Competing applications filed with the FCC for this callsign.