There are many ways to point a domain address to an alternative domain or subdomain and one of them is by setting up a CNAME record. In case you own a domain and you have developed a site using some on-line service which supplies 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 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 create a CNAME record, any other records your domain name may have will stop functioning, so you cannot have both a CNAME record pointing to one provider and functioning email addresses with another one. The CNAME record is always an alpha string, not a number, and frequently further configuration may be necessary with the other provider.