Registering a domain name and hosting one is usually mistaken by a lot of people to be one and the same thing. They're in fact 2 different services - the domain name registration is the actual name and nothing more, while the hosted domains feature shows the amount of already registered domain names that you can accommodate in the same web hosting account and have website files and e-mails for them. Your websites will work in precisely the same way regardless if the domain names are registered and hosted at the same place or are registered with company A and directed to company B. Simply registering a domain name without hosting it will give you ownership, but will not enable you to have a site if you don't host this domain name in some account so that records for it are set up and it starts opening the content from that account.