The hosted domains feature of a hosting account refers to the number of registered domains which you could include within the exact same account. Registering a domain address and hosting it are two different services although many people consider them to be the same thing. While the registration ensures that you become the owner of a certain domain address, the hosting element is what really allows you to have a web site since this is where your data and emails are going to be. Since these are 2 independent services, you are able to register a new domain with one company and host it with another by modifying its name servers (DNS) - the domain address will work in the exact same way as if it was registered and hosted with the same company. It's also very important to know that changing the hosting means pointing the domain name to an alternative company and not transferring it.
