There are various 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 set up a website through some on-line service which provides you with a service subdomain, you could easily link the two by creating a CNAME record for your-domain.com that redirects to subdomain.provider.com. What you're going to achieve with this is that www.your-domain.com will be in the Internet 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 set up a CNAME record, any other records your domain name may have will stop working, so you can't have both a CNAME record pointing to one company and working e-mail address with another one. The CNAME record is always an alpha string, not a number, and sometimes more configuration may be necessary with the other company.