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. In case you own a domain and you've developed a website through some online service which supplies 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'll achieve by doing this is that www.your-domain.com is going to be in the web browser address bar while it opens the already mentioned site from the servers of the third-party company. It is important to know that if you create a CNAME record, any other records your domain 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 often more configuration may be necessary with the other provider.