The hosted domains feature of a website hosting account denotes the amount of registered domain names that one can include in the same account. Registering a domain address and hosting it are two totally different services although a lot of people consider them to be the exact same thing. While the registration ensures that you become the owner of a certain domain name, the hosting aspect is what actually permits you to have a web site considering that this is where your data and emails are going to be. Since these are 2 independent services, you can register a new domain name with one company and host it with another one 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 exact same company. Also, it is important to know that changing the hosting means pointing the domain address to an alternative company and not transferring it.