K4OSR
Unknown1x3Zone 10
License HolderRoldan, Ernest A
License ClassTechnician
Min. Class RequiredGeneral
Requires General license or higher to apply for this callsign format (1x3).
License History
- License ModifiedJun 1, 2020
- License IssuedJan 3, 2020
- Vanity Callsign GrantedJan 3, 2020
- License ExpiredAug 18, 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.