K4JSB
Active1x3District 4
Competitive callsign — 8 applications filed with the FCC.
License HolderBUNIN, JEFFREY S
License ClassGeneral
Min. Class RequiredGeneral
LocationBoynton Beach, FL
Grant DateJul 25, 2026
Expiration DateSep 8, 2036
K4JSB is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by BUNIN, JEFFREY S in Boynton Beach, FL. This callsign has attracted significant interest in the amateur radio community, with 8 vanity applications filed with the FCC. The most recent was submitted by BUFFINGTON, JEFFREY S on Oct 4, 2019. K4JSB has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- .--- ... -...
CW Weight: 33 units(Moderate)
Voice Phonetics
Kilo Four Juliet Sierra Bravo
Readability: 7/10(Good readability)
License History
- License RenewedJul 25, 2026
- Administrative Update AppliedMay 22, 2025
- License RenewedJun 25, 2016
- Administrative Update AppliedAug 16, 2011
- Administrative Update AppliedAug 16, 2011
- License IssuedSep 8, 2006
- Vanity Callsign GrantedSep 8, 2006
Vanity Application Activity
Competing applications filed with the FCC for this callsign.