Registering a domain name and hosting one is frequently mistaken by many people to be one and the same thing. They're in fact two separate services - the domain address registration is the actual name and nothing else, while the hosted domains feature reveals the amount of already registered domain addresses that you can accommodate in the same hosting account and have website data and emails 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 grant you ownership, but will not allow you to have a web site unless you host this domain in some account so that records for it are created and it starts opening the information from that account.