What are top-level domain names, second-level domain names, third-level domain names, and fourth-level domain names?

The top-level domain name (TLD) is the highest level in DNS; the second-level domain name is below the TLD and identifies a specific website; the third-level domain name further subdivides the website, such as "www.google.com"; the fourth-level domain name is very Use sparingly, for very specific subdomains.

Top-level domain name, second-level domain name, third-level domain name and fourth-level domain name

What is the top-level domain name domain name?

The top-level domain name (TLD) is the highest level in the Domain Name System (DNS). It is also the right-most part of an Internet address, such as ".com", ".org", or ".cn".

What is a second-level domain name?

The second-level domain name is the next level below the top-level domain name. It is often used to identify a specific organization or website, such as "google", "wikipedia" or "baidu".

What is a third-level domain name?

The third-level domain name is the next level below the second-level domain name. It is often used to further segment a website, such as "www.google.com", "en.wikipedia.org" or "image.baidu.com".

What is a fourth-level domain name?

The fourth-level domain name is the next level below the third-level domain name and is rarely used. It can be used for very specific subdomains, such as "mail.accounts.google.com".

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