Registering a domain and hosting one is sometimes mistaken by many people to be the same thing. They are in fact 2 different services - the domain registration is the actual name and nothing more, while the hosted domains feature shows the number of already registered domains which you can accommodate in the same hosting account and have site data and email messages for them. Your websites will work in precisely the same way regardless of whether the domain names are registered and hosted at the same 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 allow you to have a web site until you host this domain in some account so that records for it are set up and it starts opening the information from that account.