There are several ways to redirect a domain name to a different 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 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 points to subdomain.provider.com. What you're 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 site from the servers of the third-party company. You should know that if you create a CNAME record, any other records your domain may have will stop working, so you can't have both a CNAME record directing to one provider and functioning email addresses with a different one. The CNAME record is always an alpha string, not a number, and sometimes additional configuration may be necessary with the other provider.