The hosted domains feature of a web hosting account indicates the number of registered domain names which you could add in the exact same account. Registering a domain address and hosting it are 2 different services although many people consider them to be the exact same thing. While the registration ensures that you become the owner of a certain domain name, the hosting part is what actually enables you to have a web site since this is where your data and emails will be. Since these are two separate services, you are able to register a new domain with one company and host it with another one by changing its name servers (DNS) - the domain address will work in the exact same way just as if it was registered and hosted with the exact same company. Also, it is very important to know that changing the hosting means pointing the domain address to an alternative company and not transferring it.