There are many ways to redirect 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 through some online service which provides you with a service subdomain, you can 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 with this is that www.your-domain.com will be in the browser address bar while it opens the already mentioned site 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 working, so you can't have both a CNAME record directing to one company and functioning e-mail address with another. The CNAME record is always an alpha string, not a number, and in some cases more configuration may be needed with the other company.