There are lots of ways to point a domain address to another domain or subdomain and one of them is by setting up a CNAME record. If you own a domain and you've set up a website using some online service which 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 will be in the browser address bar while it opens the already mentioned Internet site from the servers of the third-party company. It is very important to know that if you set up a CNAME record, any other records your domain name may have will stop working, so you cannot have both a CNAME record directing to one company and working e-mail address with another one. The CNAME record is always an alpha string, not a number, and in some cases more configuration may be needed with the other company.