KO4YUM
Unknown2x3Zone 4
License HolderROBERTSON, TOBIAS B
License ClassGeneral
Min. Class RequiredTechnician
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- Administrative Update AppliedDec 18, 2025
- Administrative Update AppliedNov 21, 2023
- Administrative Update AppliedMay 19, 2023
- System-Generated GrantMar 21, 2022
- License IssuedMar 21, 2022
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.