Registering a domain name and hosting one is commonly mistaken by a lot of people to be the same thing. They are actually two different services - the domain address registration is the actual name and nothing else, while the hosted domains feature reveals the amount of already registered domain addresses which you can accommodate in the same hosting account and have site data and e-mails for them. Your sites will work in precisely the same way regardless of whether the domain names are registered and hosted in one place or are registered with company A and pointed to company B. Simply registering a domain name without hosting it will give you ownership, but will not enable you to have a website unless you host this domain in some account so that records for it are set up and it starts opening the data from that account.