Each domain extension, otherwise known as Top Level Domain (TLD) is managed by a domain registry. TLD’s are the part of the domain name that are located to the right of the dot (.) in the domain name, such as .com, .net, .biz, .org, .co.uk. Read our About Domain Names article to learn more.
Domain Registries do not directly allow you register domain names. Instead, they offer this service via domain registrars.
Although you can buy a domain name that is already registered, you will still need to do the transfer of ownership via a domain registrar, or transfer the domain name from its existing domain registrar to your preferred domain registrar.