Registering a domain and hosting one is sometimes mistaken by a lot of people to be the same thing. They are actually 2 different services - the domain name registration is the actual name and nothing more, while the hosted domains feature reveals the number of already registered domains that you can accommodate in the same hosting account and have website data and email messages for them. Your websites will function in exactly the same way no matter whether the domains are registered and hosted at the same 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 allow 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 content from that account.