Registering a domain name and hosting one is commonly mistaken by a lot of people to be one and the same thing. These are in reality 2 separate services - the domain address registration is the actual name and nothing else, while the hosted domains feature refers to the number of already registered domain addresses that you can accommodate within the same website hosting account and have website files and emails for them. Your websites 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 without hosting it will grant you ownership, but will not enable you to have a web site until you host this domain name in some account so that records for it are set up and it starts opening the content from that account.