Following eligibility lists contain K3DUH
 Club  | Timestamp | Geo Type | Club Ctr | Call | Grid | Distance |
| Northeast Maryland Amateur Radio Contest Society | 2024-11-15 21:43:15 | 250 mile circle | FM19tm | K3DUH | FM19ol | 22.4 |
| Potomac Valley Radio Club | 2018-01-05 18:20:45 | 175 mile circle | FM17bk | K3DUH | FM19ol | 152.8 |
| Potomac Valley Radio Club | 2017-11-18 03:46:27 | 175 mile circle | FM17bk | K3DUH | FM19ol | 152.8 |
| Potomac Valley Radio Club | 2017-11-04 16:33:09 | 175 mile circle | FM17bk | K3DUH | FM19ol | 152.8 |
| Potomac Valley Radio Club | 2017-10-25 14:52:46 | 175 mile circle | FM17bk | K3DUH | FM19ol | 152.8 |
| Potomac Valley Radio Club | 2017-09-09 11:16:54 | 175 mile circle | FM08vb | K3DUH | FM19ol | 124.1 |
| Potomac Valley Radio Club | 2017-06-03 18:30:24 | 175 mile circle | FM08vb | K3DUH | FM19ol | 124.1 |
| Potomac Valley Radio Club | 2017-02-14 03:40:15 | 175 mile circle | FM17bk | K3DUH | FM19ol | 152.8 |
| Potomac Valley Radio Club | 2017-01-17 19:46:46 | 175 mile circle | FM08vb | K3DUH | FM19ol | 124.1 |
| Potomac Valley Radio Club | 2017-01-17 19:44:59 | 175 mile circle | FM17bk | K3DUH | FM19ol | 152.8 |
| Potomac Valley Radio Club | 2017-01-07 17:05:32 | 175 mile circle | FM17bk | K3DUH | FM19ol | 152.8 |
| Potomac Valley Radio Club | 2016-11-04 15:32:34 | 175 mile circle | FM17bk | K3DUH | FM19ol | 152.8 |
| Potomac Valley Radio Club | 2016-10-22 13:16:27 | 175 mile circle | FM17bk | K3DUH | FM19ol | 152.8 |