There are several ways to redirect a domain address to another domain or subdomain and one of them is by creating a CNAME record. If you own a domain name and you've created a site using some on-line service which supplies you with a service subdomain, you can easily link the two by setting up a CNAME record for your-domain.com that redirects to subdomain.provider.com. What you will 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 essential 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 pointing to one provider and working email addresses with another. The CNAME record is always an alpha string, not a number, and sometimes more configuration may be necessary with the other provider.