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