Amateur Radio Callsign: KB1STO
|   | KB1STO | 
| YELLEN, DAVID W NEWTON, MA (United States) | |
| License Status | Active | 
|---|---|
| Operator Class | Technician | 
| Name | YELLEN, DAVID W | 
| Granted | 2019-05-23 | 
| Expires | 2029-07-23 | 
| Address | 
 
                 
                