The hosted domains feature of a website hosting account denotes the amount of registered domain names that you can include in the exact same account. Registering a domain and hosting it are two completely different services although some people consider them to be the same thing. While the registration ensures that you become the owner of a certain domain name, the hosting element is what actually allows you to have a website as this is where your data and e-mails are going to be. Because these are 2 separate services, it is possible to register a new domain name with one company and host it with another by changing its name servers (DNS) - the domain name is going to work in the exact same way just as if it was registered and hosted with the exact same company. It's also extremely important to know that changing the hosting means directing the domain name to another company and not transferring it.