There are various ways to redirect a domain to an alternative domain or subdomain and one of them is by creating a CNAME record. If you own a domain and you have created a site through some on-line 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 redirects to subdomain.provider.com. What you are going to achieve as a result is that www.your-domain.com will be in the web browser address bar while it opens the already mentioned website from the servers of the third-party company. You should know that if you create a CNAME record, any other records your domain address may have will stop functioning, so you can't have both a CNAME record pointing to one provider and working email addresses with a different one. The CNAME record is always an alpha string, not a number, and sometimes additional configuration may be required with the other company.