K1YUU
Active1x3District 1
Competitive callsign — 1 application filed with the FCC.
License HolderPLUMMER, ARTHUR M
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationSAN FRANCISCO, CA
Grant DateApr 4, 2017
Expiration DateApr 4, 2027
K1YUU is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by PLUMMER, ARTHUR M in SAN FRANCISCO, CA. 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 Sowden, Matthew C on Mar 16, 2017. K1YUU has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .---- -.-- ..- ..-
CW Weight: 40 units(Moderate)
Voice Phonetics
Kilo One Yankee Uniform Uniform
Readability: 7/10(Good readability)
License History
- Administrative Update AppliedNov 19, 2025
- Administrative Update AppliedJan 27, 2023
- Administrative Update AppliedAug 17, 2021
- Administrative Update AppliedJun 23, 2018
- Vanity Callsign GrantedApr 4, 2017
- License IssuedApr 4, 2017
- License CanceledOct 5, 2001
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Sowden, Matthew CFiled Mar 16, 2017Not awardedFCC ↗