Registering a domain and hosting one is frequently mistaken by a lot of people to be the same thing. They are in fact 2 different services - the domain name registration is the actual name and nothing else, while the hosted domains feature shows the amount of already registered domains which you could accommodate within the same web hosting account and have site data and email messages for them. Your websites will work in exactly the same way no matter whether the domain addresses 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 grant you ownership, but will not allow you to have a website until you host this domain address in some account so that records for it are set up and it starts opening the information from that account.