There are many ways to direct 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 created 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 are going to achieve as a result is that www.your-domain.com is going to 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 create 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 provider 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.