KC4AA
Active2x2District 4
Competitive callsign — 3 applications filed with the FCC.
License HolderCahill, Byron P
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationRochester, MN
Grant DateJun 26, 2017
Expiration DateSep 17, 2027
KC4AA is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by Cahill, Byron P in Rochester, MN. This callsign has attracted significant interest in the amateur radio community, with 3 vanity applications filed with the FCC. The most recent was submitted by Copley, Austin L on Aug 25, 2025. KC4AA has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -.-. ....- .- .-
CW Weight: 30 units(Light (fast to send))
Voice Phonetics
Kilo Charlie Four Alpha Alpha
Readability: 8/10(High readability)
License History
- License RenewedJun 26, 2017
- License RenewedJun 26, 2007
- License ModifiedMay 11, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.