Registering a domain name and hosting one is usually mistaken by many people to be one and the same thing. They're in reality 2 different services - the domain name registration is the actual name and nothing more, while the hosted domains feature shows the number of already registered domains you can accommodate in the same website hosting account and have site files and email messages for them. Your websites will work in precisely 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 name without hosting it will give you ownership, but will not allow you to have a web site until you host this domain name in some account so that records for it are created and it starts opening the content from that account.