There are several ways to direct a domain name to a different domain or subdomain and one of them is by setting up a CNAME record. If you own a domain and you have set up a website through some online service that provides 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 are going to achieve with this is that www.your-domain.com will be in the web browser address bar while it opens the already mentioned site from the servers of the third-party provider. It is very important to know that if you set up a CNAME record, any other records your domain name may have will stop functioning, so you can't have both a CNAME record pointing to one company and functioning e-mail address with a different one. The CNAME record is always an alpha string, not a number, and in some cases further configuration may be needed with the other provider.