There are many ways to direct a domain name to an alternative domain or subdomain and one of them is by creating a CNAME record. If you own a domain and you have developed a site using some online service which supplies you with a service subdomain, you can easily link the two by creating a CNAME record for your-domain.com that points to subdomain.provider.com. What you will achieve with this is that www.your-domain.com is going to be in the web browser address bar while it opens the already mentioned website 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 may have will stop working, so you can't have both a CNAME record pointing to one company and working e-mail address with a different one. The CNAME record is always an alpha string, not a number, and frequently additional configuration may be necessary with the other provider.