- Iconicnames LLC // United States of America Domains Registrar
- IDC Frontier Inc. // Japan Domains Registrar
- IHS Telekom, Inc. // Turkey Domains Registrar
- Ilait AB // Sweden Domains Registrar
- Imminentdomains.net LLC // United States of America Domains Registrar
- Imperial Registrations, Inc. // United States of America Domains Registrar
- In2net Network Inc. // Canada Domains Registrar
- Inames Co., Ltd. // Korea, Republic of Domains Registrar
- Indirection Identity, LLC // United States of America Domains Registrar
- iNET CORPORATION // Viet Nam Domains Registrar
- Infomaniak Network SA // Switzerland Domains Registrar
- Ingenit GmbH & Co. KG // Germany Domains Registrar
- Inic GmbH // Switzerland Domains Registrar
- InlandDomains, LLC // United States of America Domains Registrar
- InsaneNames LLC // United States of America Domains Registrar
- Instant Domains, Inc. // Canada Domains Registrar
- INSTANTNAMES LLC // United States of America Domains Registrar
- Instinct Solutions, LLC // India Domains Registrar
- Instra Corporation Pty Ltd. // Australia Domains Registrar
- Intellectual Property Management Company, Inc. // United States of America Domains Registrar
- Interdominios, Inc. // Spain Domains Registrar
- Interlakenames.com LLC // United States of America Domains Registrar
- Interlink Co., Ltd. // Japan Domains Registrar
- Internet Domain Name System Beijing Engineering Research Center LLC (ZDNS) // China Domains Registrar
- Internet Domain Service BS Corp // Bahamas Domains Registrar
- Internet Internal Affairs, LLC // United States of America Domains Registrar
- Internet Invest, Ltd. dba Imena.ua // Ukraine Domains Registrar
- Internet Works Online International (HK) Co., Limited // Hong Kong, China Domains Registrar
- Intracom Middle East FZE // United Arab Emirates Domains Registrar
- INWX GmbH // Germany Domains Registrar
- IONOS SE // Germany Domains Registrar
- IP Twins SAS // France Domains Registrar
- IPIP INC. // Virgin Islands, British Domains Registrar
- IServeYourDomain.com LLC // United States of America Domains Registrar
- ITEASY Inc. // Korea, Republic of Domains Registrar
