Registering a domain name and hosting one is sometimes mistaken by many people to be one and the same thing. These are in fact 2 different services - the domain registration is the actual name and nothing more, while the hosted domains feature refers to the amount of already registered domain addresses that one could accommodate in the same hosting account and have website files and email messages for them. Your websites will function in exactly the same way no matter whether 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 enable you to have a site if you don't host this domain in some account so that records for it are created and it starts opening the content from that account.