Skip to main content

Internet Domain Name Expansion Now Underway

First New Generic Top-Level Domains Delegated

This page is available in:

Los Angeles, California… The Internet Corporation for Assigned Names and Numbers (ICANN) today announced that the first new generic Top-Level Domains (gTLDs) from its New gTLD Program were delegated. This means they were introduced into the Internet's Root Zone, the central authoritative database for the Internet's Domain Name System…

Read the press release »

More Announcements
ICANN Board to Hold Public Session and Board Meeting During Montevideo Workshop
ICANN Publishes NomCom2 Review Survey for Community Input
WEBINAR: Compliance & Consumer Safeguard Overview
Quarterly Stakeholder Update for FY17 Q4 Posted and Registration for the Q&A Webinar

A note about tracking cookies:

This site uses cookies to deliver an efficient user experience and to help us see how the site is used. If you would like to read more about the use of cookies, click here

This notice is intended to appear only the first time you visit the site on any computer.OK

Domain Name System
Internationalized Domain Name ,IDN,"IDNs are domain names that include characters used in the local representation of languages that are not written with the twenty-six letters of the basic Latin alphabet ""a-z"". An IDN can contain Latin letters with diacritical marks, as required by many European languages, or may consist of characters from non-Latin scripts such as Arabic or Chinese. Many languages also use other types of digits than the European ""0-9"". The basic Latin alphabet together with the European-Arabic digits are, for the purpose of domain names, termed ""ASCII characters"" (ASCII = American Standard Code for Information Interchange). These are also included in the broader range of ""Unicode characters"" that provides the basis for IDNs. The ""hostname rule"" requires that all domain names of the type under consideration here are stored in the DNS using only the ASCII characters listed above, with the one further addition of the hyphen ""-"". The Unicode form of an IDN therefore requires special encoding before it is entered into the DNS. The following terminology is used when distinguishing between these forms: A domain name consists of a series of ""labels"" (separated by ""dots""). The ASCII form of an IDN label is termed an ""A-label"". All operations defined in the DNS protocol use A-labels exclusively. The Unicode form, which a user expects to be displayed, is termed a ""U-label"". The difference may be illustrated with the Hindi word for ""test"" — परीका — appearing here as a U-label would (in the Devanagari script). A special form of ""ASCII compatible encoding"" (abbreviated ACE) is applied to this to produce the corresponding A-label: xn--11b5bs1di. A domain name that only includes ASCII letters, digits, and hyphens is termed an ""LDH label"". Although the definitions of A-labels and LDH-labels overlap, a name consisting exclusively of LDH labels, such as""icann.org"" is not an IDN."