KR4JSR
Cancelled2x3District 4
No competing applications on record.
License HolderSylvester, Christopher
License ClassGeneral
Min. Class RequiredTechnician
LocationLouisville, KY
Grant DateFeb 12, 2026
Cancellation DateMar 31, 2026
Available for ApplicationsApr 1, 2028
KR4JSR is a 2x3 format amateur radio callsign. It is currently registered to Sylvester, Christopher in Louisville, KY. 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: 37 units(Moderate)
Voice Phonetics
Kilo Romeo Four Juliet Sierra Romeo
Readability: 5.5/10(Moderate readability)
Available Apr 1, 2028 (632 days remaining)
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- License CanceledMar 31, 2026
- License ModifiedMar 9, 2026
- System-Generated GrantFeb 12, 2026
- License IssuedFeb 12, 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.