There are various ways to point a domain address to a different domain or subdomain and one of them is by creating a CNAME record. When you own a domain name and you have set up a site through some on-line service which provides you with a service subdomain, you could easily link the two by setting up a CNAME record for your-domain.com that points to subdomain.provider.com. What you're going to achieve in this way 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 company. It is essential to know that if you set up a CNAME record, any other records your domain may have will stop functioning, so you cannot have both a CNAME record pointing to one provider and working email addresses with another. The CNAME record is always an alpha string, not a number, and in some cases additional configuration may be necessary with the other provider.