There are various ways to direct a domain address to an alternative domain or subdomain and one of them is by setting up a CNAME record. When you own a domain name and you have set up a website through 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 points 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. It is very important to know that if you set up a CNAME record, any other records your domain may have will stop functioning, so you cannot have both a CNAME record directing to one company and functioning email addresses with another. The CNAME record is always an alpha string, not a number, and in some cases additional configuration may be required with the other company.