| .cz | Country Code | CZ.NIC, z.s.p.o | 🇨🇿Czech Republic | — |
| .dad | Generic | Charleston Road Registry Inc. | — | — |
| .dance | Generic | Dog Beach, LLC | — | — |
| .data | Generic | Dish DBS Corporation | — | — |
| .date | Generic | dot Date Limited | — | — |
| .dating | Generic | Binky Moon, LLC | — | — |
| .datsun | Generic | NISSAN MOTOR CO., LTD. | — | — |
| .day | Generic | Charleston Road Registry Inc. | — | — |
| .dclk | Generic | Charleston Road Registry Inc. | — | — |
| .dds | Generic | Registry Services, LLC | — | — |
| .de | Country Code | DENIC eG | 🇩🇪Germany | — |
| .deal | Generic | Amazon Registry Services, Inc. | — | — |
| .dealer | Generic | Intercap Registry Inc. | — | — |
| .deals | Generic | Binky Moon, LLC | — | — |
| .degree | Generic | Dog Beach, LLC | — | — |
| .delivery | Generic | Binky Moon, LLC | — | — |
| .dell | Generic | Dell Inc. | — | — |
| .deloitte | Generic | Deloitte Touche Tohmatsu | — | — |
| .delta | Generic | Delta Air Lines, Inc. | — | — |
| .democrat | Generic | Dog Beach, LLC | — | — |
| .dental | Generic | Binky Moon, LLC | — | — |
| .dentist | Generic | Dog Beach, LLC | — | — |
| .desi | Generic | Emergency Back-End Registry Operator Program - ICANN | — | — |
| .design | Generic | Registry Services, LLC | — | — |
| .dev | Generic | Charleston Road Registry Inc. | — | — |
| .dhl | Generic | Deutsche Post AG | — | — |
| .diamonds | Generic | Binky Moon, LLC | — | — |
| .diet | Generic | XYZ.COM LLC | — | — |
| .digital | Generic | Binky Moon, LLC | — | — |
| .direct | Generic | Binky Moon, LLC | — | — |
| .directory | Generic | Binky Moon, LLC | — | — |
| .discount | Generic | Binky Moon, LLC | — | — |
| .discover | Generic | Discover Financial Services | — | — |
| .dish | Generic | Dish DBS Corporation | — | — |
| .diy | Generic | Internet Naming Co. | — | — |
| .dj | Country Code | Djibouti Telecom S.A | 🇩🇯Djibouti | — |
| .dk | Country Code | Dansk Internet Forum | 🇩🇰Denmark | — |
| .dm | Country Code | DotDM Corporation | 🇩🇲Dominica | — |
| .dnp | Generic | Dai Nippon Printing Co., Ltd. | — | — |
| .do | Country Code | Pontificia Universidad Catolica Madre y Maestra, Recinto Santo Tomas de Aquino | 🇩🇴Dominican Republic | — |
| .docs | Generic | Charleston Road Registry Inc. | — | — |
| .doctor | Generic | Binky Moon, LLC | — | — |
| .dog | Generic | Binky Moon, LLC | — | — |
| .domains | Generic | Binky Moon, LLC | — | — |
| .dot | Generic | Dish DBS Corporation | — | — |
| .download | Generic | dot Support Limited | — | — |
| .drive | Generic | Charleston Road Registry Inc. | — | — |
| .dtv | Generic | Dish DBS Corporation | — | — |
| .dubai | Generic | Dubai Smart Government Department | — | — |
| .dupont | Generic | DuPont Specialty Products USA, LLC | — | — |