Following eligibility lists contain N4SDB
 Club  | Timestamp | Geo Type | Club Ctr | Call | Grid | Distance |
| Alabama Contest Group | 2018-10-29 15:10:49 | 175 mile circle | EM62pn | N4SDB | EM60gu | 126.0 |
| Alabama Contest Group | 2016-10-28 18:39:51 | ARRL Section | Alabama | N4SDB | EM60gu | [no dist] |