K4OSI
Unknown1x3Zone 4
License HolderJohnson, Robert M
License ClassGeneral
Min. Class RequiredGeneral
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.
No competing applications detected. Monitor the FCC ULS application search to verify before filing.