Amateur Radio Callsign: W1SJM
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W1SJM |
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Mattern, Stephen J
Plymouth, MA (United States) |
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| License Status | Active |
|---|---|
| Operator Class | General |
| Name | Mattern, Stephen J |
| Granted | 2025-09-11 |
| Expires | 2035-09-11 |
| Address |