Registering a domain name and hosting one is often mistaken by many people to be the same thing. They are in fact two different services - the domain name registration is the actual name and nothing else, while the hosted domains feature shows the amount of already registered domain names which you can accommodate in the same website hosting account and have site files and e-mails for them. Your sites will function in exactly the same way regardless if the domains are registered and hosted at the same place or are registered with company A and directed to company B. Simply registering a domain without hosting it will give you ownership, but will not allow you to have a web site if you don't host this domain address in some account so that records for it are created and it starts opening the data from that account.