When you first try to manage your domain’s DNS, everything may seem very confusing. Do not panic! DNS records can be intimidating, but they will not be as complex as you feel them. Below are explanations of more common types.
The first A record in this example points to the bare version of your domain. This means that when someone enters their browser and enters the domain name without www, he goes to the desired server and website. The second entry, A, is a wildcard version. This redirects any subdomains to your domain to the server; this includes www, and everything else that people can type in front of your domain name.
If you have any specific subdomains for which you need to set records, you will also do this with records A in the same way. So, if in the above example you want to create a subdomain named test.name.com, then you must create an A record that looks like this:
Using this method, you can also specify subdomains on servers other than your main site, depending on your needs.