Registering a domain name and hosting one is usually mistaken by many people to be one and the same thing. They are in fact two separate services - the domain registration is the actual name and nothing more, while the hosted domains feature reveals the amount of already registered domain addresses you can accommodate within 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 grant you ownership, but will not allow you to have a web site unless you host this domain name in some account so that records for it are set up and it starts opening the data from that account.