Registering a domain name and hosting one is commonly mistaken by a lot of people to be one and the same thing. They are in fact two separate services - the domain address registration is the actual name and nothing else, while the hosted domains feature refers to the amount of already registered domains which you can accommodate in the same website hosting account and have site data and e-mails for them. Your sites will work in precisely the same way no matter whether the domain names are registered and hosted at the same place or are registered with company A and pointed to company B. Simply registering a domain without hosting it will grant you ownership, but will not allow you to have a website until you host this domain in some account so that records for it are set up and it starts opening the information from that account.