Registering a domain and hosting one is frequently mistaken by many people to be the same thing. They're in fact two different services - the domain address registration is the actual name and nothing else, while the hosted domains feature shows the amount of already registered domain names that one could accommodate in the same website hosting account and have website files and e-mails for them. Your websites will function in exactly the same way regardless of whether the domain addresses are registered and hosted in one place or are registered with company A and directed to company B. Simply registering a domain without hosting it will grant 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 information from that account.