Registering a domain name and hosting one is usually mistaken by a lot of people to be the same thing. These are actually two different services - the domain name registration is the actual name and nothing else, while the hosted domains feature shows the number of already registered domain addresses that one could accommodate within the same web hosting account and have site files and e-mails for them. Your sites will function in precisely the same way regardless of whether the domain names are registered and hosted in one place or are registered with company A and pointed to company B. Simply registering a domain without hosting it will give you ownership, but will not enable you to have a site until you host this domain address in some account so that records for it are created and it starts opening the information from that account.