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.[10] 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. For example, in the domain name www.example.com., the top-level domain is com. Responsibility for management of most top-level domains is delegated to specific organizations by the Internet Governance Forum (IGF) an Internet multi-stakeholder community, which operates the Internet Assigned Numbers Authority (IANA), and is in charge of maintaining the DNS root zone.

Examples of the over 1,500 TLDs
Example domain Type Sponsoring institution
arpa Infrastructure Internet Architecture Board; restricted[1]
blue Generic Afilias Limited; unrestricted[2][3]
ovh Generic OVH SAS; run by AFNIC, unrestricted[4]
name Restricted generic VeriSign Information Services, Inc.; unrestricted[5]
ac Country-code Cable and Wireless (Ascension Island); unrestricted[6]
zw Country-code Postal and Telecommunications Regulatory Authority of Zimbabwe; unrestricted[7]
aero Sponsored Société Internationale de Télécommunications Aéronautiques; unrestricted[8]
ไทย Internationalized country-code THNIC[9]