There are numerous ways to point a domain to a different domain or subdomain and one of them is by setting up a CNAME record. When you own a domain and you've set up a website using 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'll achieve by doing this is that www.your-domain.com will be in the Internet browser address bar while it opens the already mentioned Internet site from the servers of the third-party company. You should 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 pointing to one company and working email addresses with another one. The CNAME record is always an alpha string, not a number, and often additional configuration may be necessary with the other provider.