Registering a domain name and hosting one is frequently mistaken by a lot of people to be one and the same thing. They are in fact two separate services - the domain registration is the actual name and nothing else, while the hosted domains feature reveals the amount of already registered domain names which you can accommodate in the same web hosting account and have website data and email messages for them. Your websites will function in precisely 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 name without hosting it will grant you ownership, but will not allow you to have a website if you don't host this domain in some account so that records for it are created and it starts opening the data from that account.