There are many ways to point a domain address to a different domain or subdomain and one of them is by creating a CNAME record. If you own a domain and you've developed a website using some on-line service which supplies you with a service subdomain, you could easily link the two by creating a CNAME record for your-domain.com that directs to subdomain.provider.com. What you are going to achieve in this way is that www.your-domain.com is going to be in the browser address bar while it opens the already mentioned site from the servers of the third-party provider. It is very important to know that if you set up a CNAME record, any other records your domain name may have will stop working, so you cannot have both a CNAME record directing to one company and functioning email addresses with another. The CNAME record is always an alpha string, not a number, and often further configuration may be necessary with the other provider.