There are many ways to point a domain to an alternative domain or subdomain and one of them is by setting up a CNAME record. If you own a domain name and you have set up a site using some on-line service that provides 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 as a result is that www.your-domain.com is going to be in the web 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 address may have will stop working, so you can't have both a CNAME record directing to one provider and working 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 necessary with the other provider.