There are lots of ways to point a domain to another domain or subdomain and one of them is by creating a CNAME record. When you own a domain and you've set up a website using 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 points to subdomain.provider.com. What you are going to achieve with this is that www.your-domain.com will be in the browser address bar while it opens the already mentioned Internet site from the servers of the third-party provider. It is essential to know that if you set up a CNAME record, any other records your domain may have will stop working, so you can't have both a CNAME record pointing to one company and functioning e-mail address with another. The CNAME record is always an alpha string, not a number, and often more configuration may be necessary with the other provider.