Registering a domain name and hosting one is commonly mistaken by a lot of people to be the same thing. These are actually two separate services - the domain registration is the actual name and nothing else, while the hosted domains feature reveals the amount of already registered domain addresses which you could accommodate in the same hosting account and have website files and e-mails 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 directed to company B. Simply registering a domain address without hosting it will grant you ownership, but will not enable 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 content from that account.