QDN
| Acronym | Definition |
|---|---|
| QDN | Query Direct Number |
| QDN | Quoi de Neuf (French: What's New) |
| QDN | Quality Deficiency Notice |
| QDN | Query Directory Number |
| QDN | Quality Directors Network |
| QDN | Quilt Design Northwest (Boring, OR) |
| QDN | Quality Dentistry Network (various locations) |