KR4ISO
Cancelled2x3Zone 4
License HolderKnudsen, Jonathan A
License ClassTechnician
Min. Class RequiredTechnician
Grant DateJan 6, 2026
Cancellation DateFeb 7, 2026
Available for ApplicationsFeb 8, 2028
Available Feb 8, 2028 (605 days remaining)
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- License CanceledFeb 7, 2026
- System-Generated GrantJan 6, 2026
- License IssuedJan 6, 2026
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.