There are many ways to direct a domain to another domain or subdomain and one of them is by setting up a CNAME record. In case you own a domain and you've created a site using 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 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 Internet browser address bar while it opens the already mentioned website from the servers of the third-party company. It is important to know that if you set up a CNAME record, any other records your domain may have will stop working, so you can't have both a CNAME record directing to one provider and working e-mail address with a different one. The CNAME record is always an alpha string, not a number, and in some cases further configuration may be required with the other provider.