World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Dunrossness and Fair Isle | GBDNF | United Kingdom |
| Dunseverick | GBDSK | United Kingdom |
| Dunstable | GBDTE | United Kingdom |
| Dunstaffnage | GBDTF | United Kingdom |
| Dunster | GBDNE | United Kingdom |
| Dunston | GBDTN | United Kingdom |
| Dunure | GBDRE | United Kingdom |
| Dunvegan | GBDVN | United Kingdom |
| Dunwich | GBDNW | United Kingdom |
| Dupo | USDUP | United States of America (the) |