K4RIO
Unknown1x3Zone 4
License HolderStephens, David L
License ClassAmateur Extra
Min. Class RequiredGeneral
Requires General license or higher to apply for this callsign format (1x3).
License History
- License RenewedMay 13, 2025
- Administrative Update AppliedJul 30, 2019
- License RenewedJun 23, 2015
- Administrative Update AppliedOct 10, 2012
- Administrative Update AppliedDec 28, 2010
- Administrative Update AppliedSep 30, 2010
- License IssuedJun 24, 2005
- Vanity Callsign GrantedJun 24, 2005
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.