There are numerous ways to direct a domain 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 through some online service that provides you with a service subdomain, you can easily link the two by setting up a CNAME record for your-domain.com that redirects to subdomain.provider.com. What you are going to achieve in this way 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 company. It is essential to know that if you create a CNAME record, any other records your domain name may have will stop functioning, so you can't have both a CNAME record directing to one company and functioning e-mail address 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.