The hosted domains feature of a web hosting account refers to the number of registered domain names that one can include in the very same account. Registering a domain address and hosting it are 2 totally different services even though many people consider them to be the exact same thing. While the registration signifies that you become the owner of a certain domain address, the hosting aspect is what actually enables you to have a website since this is where your data and emails will be. Since these are 2 different services, you'll be 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 just as if it was registered and hosted using the same company. Also, it is extremely important to know that changing the hosting means directing the domain name to an alternative company and not transferring it.