There are various ways to redirect a domain name to an alternative domain or subdomain and one of them is by creating a CNAME record. If you own a domain name and you have set up a site using some online service which provides you with a service subdomain, you could easily link the two by setting up a CNAME record for your-domain.com that redirects to subdomain.provider.com. What you're going to achieve by doing this is that www.your-domain.com is going to be in the browser address bar while it opens the already mentioned Internet 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 address may have will stop working, so you can't have both a CNAME record directing to one provider and working e-mail address with another one. The CNAME record is always an alpha string, not a number, and often more configuration may be necessary with the other company.