The hosted domains feature of a hosting account refers to the number of registered domains which you can include within the 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 that you become the owner of a certain domain address, the hosting aspect is what in fact permits you to have a website considering that this is where your files and e-mails are going to be. Because these are 2 independent services, you can register a new domain name with one company and host it with another one by modifying its name servers (DNS) - the domain address will work in the exact same way just as if it was registered and hosted with the same company. Additionally, it is extremely important to know that changing the hosting means pointing the domain name to an alternative company and not transferring it.