There are numerous ways to point a domain address to a different domain or subdomain and one of them is by creating a CNAME record. In case you own a domain and you've set up a site through 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 will achieve as a result is that www.your-domain.com is going to be in the Internet browser address bar while it opens the already mentioned site from the servers of the third-party provider. You should know that if you create a CNAME record, any other records your domain name may have will stop functioning, so you cannot have both a CNAME record directing to one provider and working email addresses with another. The CNAME record is always an alpha string, not a number, and in some cases more configuration may be required with the other provider.