The hosted domains feature of a website hosting account refers to the number of registered domains that one can add within the very same account. Registering a domain name and hosting it are two different services although some people consider them to be the very same thing. While the registration means you become the owner of a specific domain, the hosting part is what in fact allows you to have a web site as this is where your files and email messages will be. As these are 2 different services, you can register a new domain name with one company and host it with another one by modifying its name servers (DNS) - the domain name will work in the exact same way as if it was registered and hosted with the same company. Also, it is extremely important to know that changing the hosting means pointing the domain name to an alternative company and not transferring it.