K4YY
Active1x2District 4
Competitive callsign — 50 applications filed with the FCC.
License HolderSWAIN, MICHAEL J
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationJacksonville, FL
Grant DateJan 3, 2018
Expiration DateJan 3, 2028
K4YY is a highly sought-after 1x2 format amateur radio callsign. The license is currently held by SWAIN, MICHAEL J in Jacksonville, FL. This callsign has attracted significant interest in the amateur radio community, with 50 vanity applications filed with the FCC. The most recent was submitted by Burke, Tracy A on Feb 17, 2026. K4YY has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -.-- -.--
CW Weight: 34 units(Moderate)
Voice Phonetics
Kilo Four Yankee Yankee
Readability: 8.5/10(High readability)
License History
- License IssuedJan 3, 2018
- Vanity Callsign GrantedJan 3, 2018
- Internal Correction AppliedJul 18, 2017
- Internal Correction AppliedJul 18, 2017
- License RenewedAug 8, 2006
- Administrative Update AppliedJul 11, 2006
- Administrative Update AppliedJun 2, 2005
Vanity Application Activity
Competing applications filed with the FCC for this callsign.