Registering a domain and hosting one is often mistaken by many people to be one and the same thing. These are in fact 2 different services - the domain registration is the actual name and nothing more, while the hosted domains feature refers to the amount of already registered domains which you can accommodate within the same website hosting account and have site data and email messages for them. Your websites will work in precisely the same way no matter if the domain names are registered and hosted at the same place or are registered with company A and pointed to company B. Simply registering a domain address without hosting it will grant you ownership, but will not enable 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 data from that account.