The hosted domains feature of a web hosting account denotes the number of registered domains that you can add within the very same account. Registering a domain address and hosting it are two completely different services although a lot of people consider them to be the exact same thing. While the registration ensures that you become the owner of a given domain address, the hosting aspect is what actually allows you to have a web site since this is where your files and e-mails are going to be. Since these are 2 independent services, you'll be able to 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 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 an alternative company and not transferring it.