The term domain name is particularly best known in connection with the Internet where it describes the regions of administrative authority within the Domain Name System, the facility to trace resources on the Internet. Internet domain names are used in a variety of perspectives for identification, reference and access to Internet resources.

They can appear as contents of Web sites' Uniform Resource Locators ('Web-address', URL), for example www.databrine.com, electronic mail (e-mail) addresses after the customary '@' separator from the user's name or as any other part of a syntax that describes an access method to a device or service in an IP network.