KP4JSR
Active2x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderSoto Reveron, Javier
License ClassTechnician
Min. Class RequiredTechnician
LocationHumacao, PR
Grant DateMar 25, 2026
Expiration DateMay 13, 2036
KP4JSR is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Soto Reveron, Javier in Humacao, PR. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by Soto Reveron, Javier on Apr 25, 2016. KP4JSR has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .--. ....- .--- ... .-.
CW Weight: 40 units(Moderate)
Voice Phonetics
Kilo Papa Four Juliet Sierra Romeo
Readability: 6/10(Good readability)
License History
- License RenewedMar 25, 2026
- License IssuedMay 13, 2016
- Vanity Callsign GrantedMay 13, 2016
- License ExpiredApr 21, 2016
- License IssuedApr 20, 2004
- Vanity Callsign GrantedApr 20, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.