When you register a domain there are always three parties involved; the registry, registrar and registrant. Below we explain what their roles are.
The registry is responsible for the overall administration of a top-level domain. They set the policies for the domain, manage the registrations and generate the zone file.
The registrar is the middle man. It is an accredited organization that registers a domain with a registry, on behalf of the registrant. One.com is an accredited registrar with ICANN.
One.com is a registrar for a number of TLD's, among others, .dk, .se and .de domains. However, for most domains we use our partner Ascio. Ascio is a registrar that caters to other registrars and webhosting providers. It allows us to offer a lot of TLD's to our customers, without having to adapt our systems to each registry.
The registrant is the registered name holder of a domain. This person or entity owns the rights to use the domain for their website and email, as long as they pay the domain fee every year.
When you host a domain at One.com, you are the registrant.