There are various ways to redirect a domain address to a different domain or subdomain and one of them is by setting up 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 creating a CNAME record for your-domain.com that directs to subdomain.provider.com. What you will achieve by doing 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 very important to know that if you set up a CNAME record, any other records your domain may have will stop working, so you cannot have both a CNAME record pointing to one provider and working email addresses with another one. The CNAME record is always an alpha string, not a number, and often additional configuration may be necessary with the other provider.