The hosted domains feature of a website hosting account indicates the amount of registered domain names which you can add in the very same account. Registering a domain and hosting it are 2 completely different services although some people consider them to be the exact same thing. While the registration means you become the owner of a specific domain, the hosting part is what actually permits you to have a site since this is where your data and email messages are going to be. Because these are 2 independent services, you can register a new domain with one company and host it with another one by modifying its name servers (DNS) - the domain name is going to work in the exact same way just as if it was registered and hosted with the exact same company. Also, it is extremely important to know that changing the hosting means pointing the domain address to a different company and not transferring it.