Registering a domain and hosting one is often mistaken by many people to be one and the same thing. These are actually 2 different services - the domain name registration is the actual name and nothing more, while the hosted domains feature shows the amount of already registered domain names you can accommodate in the same web hosting account and have site files and email messages for them. Your sites will function in precisely the same way no matter if 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 address without hosting it will give you ownership, but will not enable you to have a website until you host this domain in some account so that records for it are created and it starts opening the content from that account.