The hosted domains feature of a hosting account refers to the number of registered domain names that you can include in the very same account. Registering a domain and hosting it are two completely different services although a lot of people consider them to be the same thing. While the registration means you become the owner of a specific domain name, the hosting element is what actually enables you to have a web site as this is where your files and emails will be. Because these are 2 different services, it is possible to register a new domain with one company and host it with another one by changing its name servers (DNS) - the domain name shall work in the exact same way just as if it was registered and hosted with the exact same company. It is also extremely important to know that changing the hosting means pointing the domain address to an alternative company and not transferring it.