The hosted domains feature of a hosting account denotes the amount of registered domain names that you could add within the exact same account. Registering a domain address and hosting it are 2 completely different services even though many people consider them to be the same thing. While the registration means that you become the owner of a certain domain, the hosting part is what really enables you to have a site considering that this is where your files and e-mails are going to be. Since these are two separate services, you are able to register a new domain address 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 just as if it was registered and hosted with the exact same company. Also, it is important to know that changing the hosting means directing the domain address to a different company and not transferring it.