Registering a domain name and hosting one is often mistaken by a lot of people to be the same thing. They're in reality two separate services - the domain registration is the actual name and nothing more, while the hosted domains feature refers to the number of already registered domain names you can accommodate within the same hosting account and have site files and email messages for them. Your websites will function in exactly the same way regardless of whether the domains are registered and hosted in one 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 enable you to have a site unless you host this domain name in some account so that records for it are created and it starts opening the data from that account.