| .cards | Generic | Binky Moon, LLC | — | — |
| .care | Generic | Binky Moon, LLC | — | — |
| .career | Generic | dotCareer LLC | — | — |
| .careers | Generic | Binky Moon, LLC | — | — |
| .cars | Generic | XYZ.COM LLC | — | — |
| .casa | Generic | Registry Services, LLC | — | — |
| .case | Generic | Digity, LLC | — | — |
| .cash | Generic | Binky Moon, LLC | — | — |
| .casino | Generic | Binky Moon, LLC | — | — |
| .cat | Sponsored | Fundacio puntCAT | — | — |
| .catering | Generic | Binky Moon, LLC | — | — |
| .catholic | Generic | Pontificium Consilium de Comunicationibus Socialibus (PCCS) (Pontifical Council for Social Communication) | — | — |
| .cba | Generic | COMMONWEALTH BANK OF AUSTRALIA | — | — |
| .cbn | Generic | The Christian Broadcasting Network, Inc. | — | — |
| .cbre | Generic | CBRE, Inc. | — | — |
| .cc | Country Code | eNIC Cocos (Keeling) Islands Pty. Ltd. d/b/a Island Internet Services | 🇨🇨Cocos (Keeling) Islands | — |
| .cd | Country Code | Office Congolais des Postes et Télécommunications - OCPT | 🇨🇩Congo (DRC) | — |
| .center | Generic | Binky Moon, LLC | — | — |
| .ceo | Generic | XYZ.COM LLC | — | — |
| .cern | Generic | European Organization for Nuclear Research ("CERN") | — | — |
| .cf | Country Code | Societe Centrafricaine de Telecommunications (SOCATEL) | 🇨🇫Central African Republic | — |
| .cfa | Generic | CFA Institute | — | — |
| .cfd | Generic | Shortdot SA | — | — |
| .cg | Country Code | Interpoint Switzerland | 🇨🇬Congo | — |
| .ch | Country Code | SWITCH The Swiss Education & Research Network | 🇨🇭Switzerland | — |
| .chanel | Generic | Chanel International B.V. | — | — |
| .channel | Generic | Charleston Road Registry Inc. | — | — |
| .charity | Generic | Public Interest Registry (PIR) | — | — |
| .chase | Generic | JPMorgan Chase Bank, National Association | — | — |
| .chat | Generic | Binky Moon, LLC | — | — |
| .cheap | Generic | Binky Moon, LLC | — | — |
| .chintai | Generic | CHINTAI Corporation | — | — |
| .christmas | Generic | XYZ.COM LLC | — | — |
| .chrome | Generic | Charleston Road Registry Inc. | — | — |
| .church | Generic | Binky Moon, LLC | — | — |
| .ci | Country Code | Autorité de Régulation des Télécommunications/TIC de Côte d’lvoire (ARTCI) | 🇨🇮Cote d'Ivoire | — |
| .cipriani | Generic | Hotel Cipriani Srl | — | — |
| .circle | Generic | Amazon Registry Services, Inc. | — | — |
| .cisco | Generic | Cisco Technology, Inc. | — | — |
| .citadel | Generic | Citadel Domain LLC | — | — |
| .citi | Generic | Citigroup Inc. | — | — |
| .citic | Generic | CITIC Group Corporation | — | — |
| .city | Generic | Binky Moon, LLC | — | — |
| .ck | Country Code | Telecom Cook Islands Ltd. | 🇨🇰Cook Islands | — |
| .cl | Country Code | NIC Chile (University of Chile) | 🇨🇱Chile | — |
| .claims | Generic | Binky Moon, LLC | — | — |
| .cleaning | Generic | Binky Moon, LLC | — | — |
| .click | Generic | Internet Naming Co. | — | — |
| .clinic | Generic | Binky Moon, LLC | — | — |
| .clinique | Generic | The Estée Lauder Companies Inc. | — | — |