- Rabbitsfoot.com LLC d/b/a Oxygen.nyc // United States of America Domains Registrar
- Rainydaydomains.com LLC // United States of America Domains Registrar
- Rally Cry Domains, LLC // United States of America Domains Registrar
- Rank USA, LLC // India Domains Registrar
- Rare Gem Domains LLC // United States of America Domains Registrar
- Realtime Register B.V. // Netherlands Domains Registrar
- Rebel Ltd // Canada Domains Registrar
- Rebel.ca Corp. // Canada Domains Registrar
- ReclaimDomains LLC // United States of America Domains Registrar
- Regional Network Information Center, JSC dba RU-CENTER // Russian Federation Domains Registrar
- Register Names, LLC // United States of America Domains Registrar
- Register SpA // Italy Domains Registrar
- Register.ca Inc. // Canada Domains Registrar
- Register.com, Inc. // United States of America Domains Registrar
- Register4Less, Inc. // Canada Domains Registrar
- Registrar Manager Inc. // United States of America Domains Registrar
- Registrar of Domain Names REG.RU LLC // Russian Federation Domains Registrar
- Registrar of domains names s.r.o. // Czech Republic Domains Registrar
- Registrar R01 LLC // Russian Federation Domains Registrar
- RegistrarBrand, LLC // United States of America Domains Registrar
- RegistrarDirect LLC // United States of America Domains Registrar
- RegistrarGuard, LLC // United States of America Domains Registrar
- RegistrarSafe, LLC // United States of America Domains Registrar
- RegistrarSEC LLC // United States of America Domains Registrar
- RegistrarSecure, LLC // United States of America Domains Registrar
- RegistrarTrust, LLC // United States of America Domains Registrar
- Registrator Domenov LLC // Russian Federation Domains Registrar
- RegistryGate GmbH // Germany Domains Registrar
- Regtime Ltd. // Russian Federation Domains Registrar
- Reliable Software // Belarus Domains Registrar
- Reseller Services, Inc. dba ResellServ.com // United States of America Domains Registrar
- Retail Domains, LLC // United States of America Domains Registrar
- Ripcord Domains, LLC // United States of America Domains Registrar
- Ripcurl Domains, LLC // United States of America Domains Registrar
- Riptide Domains, LLC // United States of America Domains Registrar
- RiVidium Inc. // United States of America Domains Registrar
- rockenstein AG // Germany Domains Registrar
