| .rehab | Generic | Dog Beach, LLC | — | — |
| .reise | Generic | Binky Moon, LLC | — | — |
| .reisen | Generic | Binky Moon, LLC | — | — |
| .reit | Generic | National Association of Real Estate Investment Trusts, Inc. | — | — |
| .reliance | Generic | Reliance Industries Limited | — | — |
| .ren | Generic | ZDNS International Limited | — | — |
| .rent | Generic | XYZ.COM LLC | — | — |
| .rentals | Generic | Binky Moon, LLC | — | — |
| .repair | Generic | Binky Moon, LLC | — | — |
| .report | Generic | Binky Moon, LLC | — | — |
| .republican | Generic | Dog Beach, LLC | — | — |
| .rest | Generic | Punto 2012 Sociedad Anonima Promotora de Inversion de Capital Variable | — | — |
| .restaurant | Generic | Binky Moon, LLC | — | — |
| .review | Generic | dot Review Limited | — | — |
| .reviews | Generic | Dog Beach, LLC | — | — |
| .rexroth | Generic | Robert Bosch GMBH | — | — |
| .rich | Generic | iRegistry GmbH | — | — |
| .richardli | Generic | Pacific Century Asset Management (HK) Limited | — | — |
| .ricoh | Generic | Ricoh Company, Ltd. | — | — |
| .ril | Generic | Reliance Industries Limited | — | — |
| .rio | Generic | Empresa Municipal de Informática SA - IPLANRIO | — | — |
| .rip | Generic | Dog Beach, LLC | — | — |
| .ro | Country Code | National Institute for R&D in Informatics | 🇷🇴Romania | — |
| .rocks | Generic | Dog Beach, LLC | — | — |
| .rodeo | Generic | Registry Services, LLC | — | — |
| .rogers | Generic | Rogers Communications Canada Inc. | — | — |
| .room | Generic | Amazon Registry Services, Inc. | — | — |
| .rs | Country Code | Serbian National Internet Domain Registry (RNIDS) | 🇷🇸Serbia | — |
| .rsvp | Generic | Charleston Road Registry Inc. | — | — |
| .ru | Country Code | Coordination Center for TLD RU | 🇷🇺Russia | — |
| .rugby | Generic | World Rugby Strategic Developments Limited | — | — |
| .ruhr | Generic | dotSaarland GmbH | — | — |
| .run | Generic | Binky Moon, LLC | — | — |
| .rw | Country Code | Rwanda Internet Community and Technology Alliance (RICTA) Ltd | 🇷🇼Rwanda | — |
| .rwe | Generic | RWE AG | — | — |
| .ryukyu | Generic | BRregistry, Inc. | — | — |
| .sa | Country Code | Communications, Space and Technology Commission | 🇸🇦Saudi Arabia | — |
| .saarland | Generic | dotSaarland GmbH | — | — |
| .safe | Generic | Amazon Registry Services, Inc. | — | — |
| .safety | Generic | Safety Registry Services, LLC. | — | — |
| .sakura | Generic | SAKURA internet Inc. | — | — |
| .sale | Generic | Dog Beach, LLC | — | — |
| .salon | Generic | Binky Moon, LLC | — | — |
| .samsclub | Generic | Wal-Mart Stores, Inc. | — | — |
| .samsung | Generic | SAMSUNG SDS CO., LTD | — | — |
| .sandvik | Generic | Sandvik AB | — | — |
| .sandvikcoromant | Generic | Sandvik AB | — | — |
| .sanofi | Generic | Sanofi | — | — |
| .sap | Generic | SAP AG | — | — |
| .sarl | Generic | Binky Moon, LLC | — | — |