There are many ways to direct a domain name to another domain or subdomain and one of them is by setting up a CNAME record. When you own a domain name and you have set up a site through some online service which supplies you with a service subdomain, you could easily link the two by setting up a CNAME record for your-domain.com that redirects to subdomain.provider.com. What you're going to achieve with this is that www.your-domain.com will be in the web 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 address may have will stop working, so you can't have both a CNAME record directing to one company and working email addresses with another one. The CNAME record is always an alpha string, not a number, and frequently additional configuration may be required with the other provider.