Domain Levels

Domains are classified into different levels depending on the number of dots within the full domain name.

If a domain has one dot, for example, site.com, then this is a second level domain. If a domain has two dots, for example, blog.site.com, then this is a third level domain or, in other words, a subdomain.

The question arises, where is the first level domain? This refers to the actual domain zone itself, in our case .com.

Domains can also be of higher levels: fourth, fifth, but this is extremely rare.