There are various ways to point a domain address to an alternative domain or subdomain and one of them is by setting up a CNAME record. If you own a domain and you've created a site through some on-line service which supplies you with a service subdomain, you can easily link the two by setting up a CNAME record for your-domain.com that directs to subdomain.provider.com. What you are going to achieve with this is that www.your-domain.com will be in the web browser address bar while it opens the already mentioned website from the servers of the third-party provider. It is very important to know that if you create a CNAME record, any other records your domain name may have will stop working, so you can't have both a CNAME record directing to one provider and functioning email addresses with a different one. The CNAME record is always an alpha string, not a number, and in some cases additional configuration may be needed with the other company.