Top-level domain

A top-level domain (TLD) is one of the domains at the highest level in the hierarchical Domain Name System of the Internet after the root domain. The top-level domain names are installed in the root zone of the name space. For all domains in lower levels, it is the last part of the domain name, that is, the last non-empty label of a fully qualified domain name.

Extends: [Top-level domains](https://wikipedia.org.ai/Top-level domains), [Domain Name System](https://wikipedia.org.ai/Domain Name System), Identifiers, [Internet governance](https://wikipedia.org.ai/Internet governance), [1980s establishments](https://wikipedia.org.ai/1980s establishments)