List of Internet top-level domains  This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet. A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. IANA also oversees the approval process for new proposed top-level domains for ICANN. , their root domain contains 1511 top-level domains, with a number of TLDs that have been retired and are no longer functional. , the IANA root database includes 1,584 TLDs, including 55 that are not assigned (revoked), 8 that are retired and 11 test domains and are thus not represented in ICANN's listing and are not in root.zone file. IANA distinguishes the following groups of top-level domains:   Seven generic top-level domains were created early in the development of the Internet, and predate the creation of ICANN in 1998. As of 20 May 2017, there were 255 country-code top-level domains, purely in the Latin alphabet, using two-character codes. , this number is 316, with the addition of internationalized domains. Internationalised domain names have been proposed for Israel, Japan and Libya. All of these TLDs are internationalized domain names (IDN) and support second-level IDNs. ICANN/IANA has created some Special-Use domain names which are meant for special technical purposes. ICANN/IANA owns all of the Special-Use domain names.