Skip to main content

Join Us

Register to join the next Quarterly Stakeholder Call on 27 April, at 1500 UTC. The call is available in Arabic, Chinese, English, French, Portuguese, Russian, and Spanish and provides a good overview of activities from the quarter ending 31 March.

Register Now

News and Announcements

Contribute to the ICANN Ombudsman Function Survey

Take a survey to contribute your view to the Independent assessment of the Ombudsman Office

Have you ever interacted with ICANN’s Office of the Ombudsman? Do you feel there is opportunity for improvement? Please take 10 minutes to participate in this survey and provide your input on the ongoing assessment of ICANN’s Office of the Ombudsman. Click on the link above to learn more.

15 NextGen Participants to Attend ICANN59

15 Students to Participate in ICANN59 NextGen Program

15 individuals from various universities in the African Region will join ICANN community members at the ICANN59 meeting in Johannesburg, South Africa. For more information about our NextGen Program and successful candidates click on the link above.

ICANN Publishes Its First LAC Strategy Trifold

LAC Trifold

Take a look at this new resource published by ICANN’s Latin American and Caribbean (LAC) team! The aim of this trifold is to describe the regional strategy, highlight some of its most prominent projects and explain how to get involved. The resource is available in English, Spanish, Portuguese and French. Click the link above to learn more.

New Quick Guide for the Root KSK Rollover Now Available

Quick Guide: Prepare Your Systems for the Root KSK Rollover

ICANN has created a new Quick Guide as we plan to roll, or change, the “top” pair of cryptographic keys used in the Domain Name System Security Extensions (DNSSEC) protocol, commonly known as the Root Zone KSK. This document will help you prepare for the Root KSK Rollover. It is available in seven languages. Click the link above to learn more.

View all
Home groups
ICANN Groups

We depend on the support of many different types of groups and sub-structures: Advisory Commitees, Supporting Organizations, standingcommittees, working groups, review teams, task forces, and more.

Explore all Groups

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"""" is not an IDN."