K4OSI
Available1x3District 4
Competitive callsign — 4 applications filed with the FCC.
License HolderJohnson, Robert M
License ClassGeneral
Min. Class RequiredGeneral
LocationHixson, TN
Grant DateNov 1, 2013
Expiration DateMar 5, 2024
Cancellation DateMar 6, 2026
Available for ApplicationsMar 6, 2026
K4OSI is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Johnson, Robert M in Hixson, TN. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Flinders, Ronald G on Oct 15, 2019. K4OSI has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- --- ... ..
CW Weight: 28 units(Light (fast to send))
Voice Phonetics
Kilo Four Oscar Sierra India
Readability: 7/10(Good readability)
This callsign is available now
Requires General license or higher to apply for this callsign format (1x3).
License History
- License ExpiredMar 6, 2026
- License RenewedNov 1, 2013
- License IssuedJan 23, 2004
- Vanity Callsign GrantedJan 23, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.