Registering a domain and hosting one is sometimes mistaken by many people to be one and the same thing. They're in reality two separate services - the domain address registration is the actual name and nothing more, while the hosted domains feature refers to the number of already registered domains which you could accommodate in the same website hosting account and have website files and email messages for them. Your sites will function in precisely the same way no matter if the domain addresses are registered and hosted in one place or are registered with company A and directed to company B. Simply registering a domain address without hosting it will give you ownership, but will not enable you to have a web site unless you host this domain address in some account so that records for it are created and it starts opening the data from that account.