There are several 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 website using some online service that provides you with a service subdomain, you could easily link the two by setting up a CNAME record for your-domain.com that directs to subdomain.provider.com. What you are going to achieve as a result is that www.your-domain.com is going to be in the browser address bar while it opens the already mentioned website from the servers of the third-party provider. It is very important to know that if you create a CNAME record, any other records your domain name may have will stop functioning, so you cannot 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 required with the other provider.