Amateur Radio Callsign: KO4SON
|   | KO4SON | 
| Holste, Gregory A KNOXVILLE, TN (United States) | |
| License Status | Active | 
|---|---|
| Operator Class | Technician | 
| Name | Holste, Gregory A | 
| Granted | 2021-08-16 | 
| Expires | 2031-08-16 | 
| Address | 
 
                 
                