Registering a domain and hosting one is commonly mistaken by many people to be the same thing. These are in reality 2 different services - the domain address registration is the actual name and nothing else, while the hosted domains feature refers to the amount of already registered domain addresses that one could accommodate in the same website hosting account and have site 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 at the same place or are registered with company A and pointed to company B. Simply registering a domain without hosting it will give you ownership, but will not enable you to have a web site until you host this domain address in some account so that records for it are created and it starts opening the data from that account.