KR4MAT
Cancelled2x3District 4
No competing applications on record.
License HolderHeyburn, David A
License ClassAmateur Extra
Min. Class RequiredTechnician
LocationEdgewater, FL
Grant DateMay 8, 2026
Cancellation DateJun 30, 2026
Available for ApplicationsJul 1, 2028
KR4MAT is a 2x3 format amateur radio callsign. It is currently registered to Heyburn, David A in Edgewater, FL. There are currently no competing vanity applications or pending FCC filings on record for this callsign. Add it to your watchlist to receive an immediate alert if another operator files a vanity application.
CW & Voice Analysis
Morse Code
-.- .-. ....- -- .- -
CW Weight: 32 units(Moderate)
Voice Phonetics
Kilo Romeo Four Mike Alpha Tango
Readability: 7.5/10(High readability)
Available Jul 1, 2028 (723 days remaining)
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- License CanceledJun 30, 2026
- System-Generated GrantMay 8, 2026
- License IssuedMay 8, 2026
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
No competing applications on record. Verify on the FCC ULS application search before filing.