The hosted domains feature of a hosting account indicates the amount of registered domains which you can add within the very same account. Registering a domain address and hosting it are two different services although many people consider them to be the exact same thing. While the registration means that you become the owner of a certain domain, the hosting aspect is what in fact enables you to have a web site since this is where your files and e-mails are going to be. Since these are two different services, it is possible to register a new domain name with one company and host it with another by modifying its name servers (DNS) - the domain name shall work in the exact same way as if it was registered and hosted with the same company. It is also important to know that changing the hosting means pointing the domain address to another company and not transferring it.