There are numerous ways to direct a domain to another domain or subdomain and one of them is by creating a CNAME record. When you own a domain and you've created a site through some on-line service that provides you with a service subdomain, you could easily link the two by creating a CNAME record for your-domain.com that redirects to subdomain.provider.com. What you're going to achieve by doing this is that www.your-domain.com will be in the browser address bar while it opens the already mentioned website from the servers of the third-party provider. It is important to know that if you set up a CNAME record, any other records your domain name may have will stop functioning, so you can't have both a CNAME record pointing to one provider and working email addresses with another one. The CNAME record is always an alpha string, not a number, and in some cases more configuration may be required with the other company.