There are various ways to redirect a domain to an alternative domain or subdomain and one of them is by setting up a CNAME record. In case you own a domain name and you've set up a website through some online service which provides you with a service subdomain, you could easily link the two by creating a CNAME record for your-domain.com that directs to subdomain.provider.com. What you're going to achieve by doing this is that www.your-domain.com will be in the browser address bar while it opens the already mentioned Internet site from the servers of the third-party provider. You should know that if you create a CNAME record, any other records your domain may have will stop working, so you cannot have both a CNAME record pointing to one company and working e-mail address with another. The CNAME record is always an alpha string, not a number, and in some cases further configuration may be necessary with the other provider.