KM4JSR
Active2x3District 4
No competing applications on record.
License HolderKupfer, Jaeson N
License ClassTechnician
Min. Class RequiredTechnician
LocationLargo, FL
Grant DateFeb 11, 2026
Expiration DateApr 13, 2035
KM4JSR is a 2x3 format amateur radio callsign. It is currently registered to Kupfer, Jaeson N in Largo, 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: 38 units(Moderate)
Voice Phonetics
Kilo Mike Four Juliet Sierra Romeo
Readability: 6.5/10(Good readability)
License History
- License RenewedFeb 11, 2026
- Administrative Update AppliedMay 1, 2024
- System-Generated GrantApr 13, 2015
- License IssuedApr 13, 2015
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.