K4ZEN
Active1x3District 4
Competitive callsign — 4 applications filed with the FCC.
License HolderMaenner, Marcus T
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationOLDSMAR, FL
Grant DateMay 13, 2026
Expiration DateJul 23, 2036
K4ZEN is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Maenner, Marcus T in OLDSMAR, FL. 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 Baker, Eric W on Jul 21, 2025. K4ZEN has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- --.. . -.
CW Weight: 27 units(Light (fast to send))
Voice Phonetics
Kilo Four Zulu Echo November
Readability: 7.5/10(High readability)
License History
- License RenewedMay 13, 2026
- License IssuedJul 23, 2016
- Vanity Callsign GrantedJul 23, 2016
- License ExpiredMar 23, 2016
- License RenewedJan 21, 2004
- License RenewedJan 21, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.