 this is a list of internet top-level domains (tlds). a top-level domain is a domain name in the domain name system that is a direct subdomain of the dns root zone. the official list of all top-level domains is maintained by the internet assigned numbers authority (iana). in an initiative to expand the domain name space, iana is considering approval of several proposed top-level domains. , there are 735 active top-level domains and a handful of retired ones which are no longer functional. ==original top-level domains== seven generic top-level domains were created early in the development of the internet, and pre-date the creation of icann in 1998. *name: dns name *entity: intended use *notes: general remarks *idn: support for internationalized domain names (idn) *dnssec: presence of ds records for domain name system security extensions {|class="wikitable sortable" |- style="background:#a0d0ff;" !name !entity !administrator !class="unsortable"|notes !idn !dnssec |- valign="top" | .com || commercial || verisign || this is an open tld; any person or entity is permitted to register. though originally intended for use by for-profit business entities, for a number of reasons it became the "main" tld for domain names and is currently used by all types of entities including nonprofits, schools and private individuals. domain name registrations may be successfully challenged if the holder cannot prove an outside relation justifying reservation of the name, to prevent "squatting". it was originally administered by the united states department of defense. ||  ||  |- valign="top" | .org || organization || public interest registry ||this is an open tld; any person or entity is permitted to register. originally intended for use by non-profit organizations, and still primarily used by some. ||  ||  |- valign="top" | .net || network || verisign || this is an open tld; any person or entity is permitted to register. originally intended for use by domains pointing to a distributed network of computers, or "umbrella" sites that act as the portal to a set of smaller websites. ||  ||  
Country_codes Top-level_domains