K4UOS
Active1x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderPHILLIPS III, WILLIAM L
License ClassGeneral
Min. Class RequiredGeneral
LocationJOHNSON CITY, TN
Grant DateJul 1, 2026
Expiration DateJul 1, 2036
K4UOS is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by PHILLIPS III, WILLIAM L in JOHNSON CITY, TN. 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 PHILLIPS III, WILLIAM L on Mar 17, 2016. K4UOS has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- ..- --- ...
CW Weight: 31 units(Moderate)
Voice Phonetics
Kilo Four Uniform Oscar Sierra
Readability: 7/10(Good readability)
License History
- License RenewedJul 1, 2026
- Administrative Update AppliedOct 25, 2018
- License IssuedApr 5, 2016
- Vanity Callsign GrantedApr 5, 2016
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- PHILLIPS III, WILLIAM LFiled Mar 17, 2016Not awardedFCC ↗