Registering a domain name and hosting one is sometimes mistaken by many people to be one and the same thing. They are in fact 2 separate services - the domain registration is the actual name and nothing else, while the hosted domains feature refers to the number of already registered domain names you can accommodate within the same web hosting account and have site data and email messages for them. Your sites will function in exactly the same way no matter whether 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 address without hosting it will grant you ownership, but will not enable you to have a site until you host this domain in some account so that records for it are set up and it starts opening the content from that account.