Amateur Radio Callsigns in ZIP Code: 56630
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| KD0ATO | Wallin, Ayleen L | BLACKDUCK | MN | United States |
| KD0ATP | Wallin, Lyle B | BLACKDUCK | MN | United States |
| K0AFY | Swartwood, Paul R | Blackduck | MN | United States |
| KE0VUK | Dirkes, Christian M | Blackduck | MN | United States |
| KF0IEB | Beighley, Wyatt | Blackduck | MN | United States |
| KF0IEC | Wallace, Kyle E | Blackduck | MN | United States |