There are numerous ways to point a domain address to another domain or subdomain and one of them is by setting up a CNAME record. When you own a domain name and you've created 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 redirects to subdomain.provider.com. What you're going to achieve in this way 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 essential to know that if you create a CNAME record, any other records your domain address may have will stop functioning, so you cannot have both a CNAME record pointing to one company and functioning email addresses with another. The CNAME record is always an alpha string, not a number, and often further configuration may be necessary with the other company.