- Canada 001 Names Ltd. // China Domains Registrar
- Capitaldomains, LLC // United States of America Domains Registrar
- Catch Deleting Names LLC // United States of America Domains Registrar
- Catch Domains LLC // United States of America Domains Registrar
- CCI REG S.A. // Panama, Republic of Domains Registrar
- Center of Ukrainian Internet Names (UKRNAMES) // Ukraine Domains Registrar
- Chengdu Century Oriental Network Communication Co., Ltd. // China Domains Registrar
- Chengdu Fly-Digital Technology Co., Ltd. // China Domains Registrar
- Chengdu West Dimension Digital Technology Co., Ltd. // China Domains Registrar
- Chinesedomains, LLC // United States of America Domains Registrar
- Chipshot Domains LLC // United States of America Domains Registrar
- ChocolateChipDomains, LLC // United States of America Domains Registrar
- Chocolatecovereddomains,LLC // United States of America Domains Registrar
- Chunghwa Telecom Co., Ltd. // Taipei, Chinese Domains Registrar
- Circle of Domains LLC // United States of America Domains Registrar
- Claimeddomains, LLC // United States of America Domains Registrar
- Click Registrar, LLC dba publicdomainregistry.com // India Domains Registrar
- Cloud Yuqu LLC // China Domains Registrar
- CloudBreakDomains, LLC // United States of America Domains Registrar
- CloudFlare, Inc. // United States of America Domains Registrar
- CloudNineDomain, LLC // United States of America Domains Registrar
- CNOBIN INFORMATION TECHNOLOGY LIMITED // Hong Kong, China Domains Registrar
- Cocosislandsdomains, LLC // United States of America Domains Registrar
- Columbiadomains, LLC // United States of America Domains Registrar
- Columbianames.com LLC // United States of America Domains Registrar
- Combell NV // Belgium Domains Registrar
- ComfyDomains LLC // United States of America Domains Registrar
- Commerce Island, LLC // India Domains Registrar
- CommuniGal Communication Ltd. // Israel Domains Registrar
- Community Advice s.r.o. // Czech Republic Domains Registrar
- Compuglobalhypermega.com LLC // United States of America Domains Registrar
- Cool Breeze Domains, LLC // United States of America Domains Registrar
- Cool Ocean, LLC // India Domains Registrar
- Cool River Names, LLC // United States of America Domains Registrar
- Copper Domain Names LLC // United States of America Domains Registrar
- Coral Reef Domains LLC // United States of America Domains Registrar
- COREhub, S.R.L. // Spain Domains Registrar
- Corporation Service Company (DBS), Inc. // United States of America Domains Registrar
- CORPORATION SERVICE COMPANY (UK) LIMITED // United States of America Domains Registrar
- Corsearch Domains LLC // United States of America Domains Registrar
- Cosmotown, Inc. // United States of America Domains Registrar
- Costdomain.Com Inc // United States of America Domains Registrar
- Costrar EOOD // Bulgaria Domains Registrar
- CPS-Datensysteme GmbH // Germany Domains Registrar
- Crisp Names, LLC // India Domains Registrar
- Cronon GmbH // Germany Domains Registrar
- Cross Marketing Technology Ltd. // Thailand Domains Registrar
- Crystal Coal, LLC // India Domains Registrar
- CSC Corporate Domains, Inc. // United States of America Domains Registrar
- CSC Management Consulting (Shanghai) Co., Ltd. // United States of America Domains Registrar
- CSL Computer Service Langenbach GmbH d/b/a joker.com // Germany Domains Registrar
- Curious Net, LLC // India Domains Registrar
- Curveball Domains LLC // United States of America Domains Registrar
- CV. Jogjacamp // Indonesia Domains Registrar
- CV. Rumahweb Indonesia // Indonesia Domains Registrar
- CyanDomains, Inc. // China Domains Registrar
