Registering a domain and hosting one is frequently mistaken by many people to be the same thing. These are in fact 2 separate services - the domain address registration is the actual name and nothing more, while the hosted domains feature reveals the number of already registered domain names that you can accommodate in the same website hosting account and have site data and email messages for them. Your sites will work 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 unless you host this domain address in some account so that records for it are set up and it starts opening the data from that account.