K4DU
Active1x2District 4
Competitive callsign — 1 application filed with the FCC.
License HolderPATTISON, ROBERT E
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationPalmyra, VA
Grant DateAug 11, 2026
Expiration DateNov 4, 2036
K4DU is a highly sought-after 1x2 format amateur radio callsign. The license is currently held by PATTISON, ROBERT E in Palmyra, VA. This callsign has attracted significant interest in the amateur radio community, with 1 vanity application filed with the FCC. The most recent was submitted by Drew, Jefferson J on Dec 16, 2004. K4DU has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -.. ..-
CW Weight: 24 units(Light (fast to send))
Voice Phonetics
Kilo Four Delta Uniform
Readability: 8/10(High readability)
License History
- License RenewedAug 11, 2026
- Administrative Update AppliedAug 18, 2020
- License RenewedAug 8, 2016
- License RenewedAug 11, 2006
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Drew, Jefferson JFiled Dec 16, 2004DismissedFCC ↗