The hosted domains feature of a website hosting account indicates the amount of registered domains that you could add in the exact same account. Registering a domain and hosting it are two totally different services even though many people consider them to be the exact same thing. While the registration ensures that you become the owner of a given domain, the hosting element is what really permits you to have a web site considering that this is where your data and emails will be. Because these are 2 separate services, you are able to register a new domain address with one company and host it with another one by changing its name servers (DNS) - the domain is going to work in the exact same way as if it was registered and hosted with the same company. It's also important to know that changing the hosting means directing the domain name to another company and not transferring it.