KO4ZN
Unknown2x2Zone 4
License HolderMARTIN, WALTER I
License ClassAdvanced
Min. Class RequiredGeneral
Requires General license or higher to apply for this callsign format (2x2).
License History
- License ExpiredSep 19, 2025
- License RenewedSep 18, 2013
- License RenewedJun 25, 2003
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
No competing applications detected. Monitor the FCC ULS application search to verify before filing.