Registering a domain name and hosting one is frequently mistaken by a lot of people to be one and the same thing. They are actually 2 separate services - the domain name registration is the actual name and nothing more, while the hosted domains feature refers to the amount of already registered domains which you could accommodate within the same hosting account and have site files and e-mails for them. Your sites will function in precisely the same way no matter if the domain addresses are registered and hosted in one 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 until you host this domain address in some account so that records for it are set up and it starts opening the information from that account.