There are various ways to redirect a domain to an alternative domain or subdomain and one of them is by setting up a CNAME record. If you own a domain name and you have set up a site 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're going to achieve with this is that www.your-domain.com will be in the Internet browser address bar while it opens the already mentioned website 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 address may have will stop working, so you cannot have both a CNAME record pointing to one company and working e-mail address with another. The CNAME record is always an alpha string, not a number, and in some cases further configuration may be required with the other company.