There are several ways to direct a domain address to an alternative domain or subdomain and one of them is by creating a CNAME record. In case you own a domain name and you've created a site 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're going to achieve with this is that www.your-domain.com will be in the browser address bar while it opens the already mentioned Internet site from the servers of the third-party provider. You should know that if you set up a CNAME record, any other records your domain may have will stop working, so you cannot have both a CNAME record directing to one provider and functioning email addresses with another one. The CNAME record is always an alpha string, not a number, and frequently additional configuration may be necessary with the other provider.