K4BYB
Active1x3District 4
Competitive callsign — 7 applications filed with the FCC.
License HolderBIELSKI, GREGORY P
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationOAK CREEK, WI
Grant DateJan 3, 2026
Expiration DateJan 3, 2036
K4BYB is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by BIELSKI, GREGORY P in OAK CREEK, WI. This callsign has attracted significant interest in the amateur radio community, with 7 vanity applications filed with the FCC. The most recent was submitted by Prosser, Daryl A on Dec 15, 2025. K4BYB has 8 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -... -.-- -...
CW Weight: 36 units(Moderate)
Voice Phonetics
Kilo Four Bravo Yankee Bravo
Readability: 8/10(High readability)
License History
- License ModifiedJan 12, 2026
- License IssuedJan 3, 2026
- Vanity Callsign GrantedJan 3, 2026
- License CanceledJun 30, 2020
- License ModifiedFeb 24, 2020
- Administrative Update AppliedNov 13, 2019
- License IssuedJul 30, 2019
- Vanity Callsign GrantedJul 30, 2019
Vanity Application Activity
Competing applications filed with the FCC for this callsign.