Registering a domain name and hosting one is usually mistaken by many people to be one and the same thing. They are actually two different services - the domain registration is the actual name and nothing more, while the hosted domains feature shows the number of already registered domain names that you can accommodate within the same web hosting account and have site files and emails for them. Your sites will function in exactly the same way no matter whether the domains are registered and hosted in one place or are registered with company A and pointed to company B. Simply registering a domain address without hosting it will grant you ownership, but will not enable you to have a website if you don't host this domain in some account so that records for it are created and it starts opening the information from that account.