The hosted domains feature of a hosting account denotes the number of registered domains that you could include in the exact same account. Registering a domain and hosting it are two totally different services although a lot of people consider them to be the same thing. While the registration ensures that you become the owner of a given domain address, the hosting element is what really allows you to have a website because this is where your files and emails are going to be. As these are two independent services, it is possible to register a new domain with one company and host it with another by changing its name servers (DNS) - the domain will work in the exact same way just as if it was registered and hosted with the same company. Also, it is very important to know that changing the hosting means directing the domain to another company and not transferring it.