Registering a domain and hosting one is commonly mistaken by many people to be the same thing. They're actually two separate services - the domain address registration is the actual name and nothing else, while the hosted domains feature reveals the number of already registered domain names you can accommodate in the same hosting account and have site data and e-mails for them. Your websites will work in exactly the same way regardless if 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 address without hosting it will give you ownership, but will not allow you to have a web site until you host this domain in some account so that records for it are created and it starts opening the information from that account.