Skip to main content

Featured News

Get Updates
ccNSO: what it is and how it works?

New ccNSO Introductory Course Available on ICANN Learn

09 Aug 2017

ICANN61 Fellowship Application Round

ICANN61 Fellowship Application Round Now Open

09 Aug 2017

Meet the NextGen Participants Joining Us at #ICANN60

15 NextGen Participants to Attend ICANN60

09 Aug 2017

Image

Post-ICANN59 Policy Report Now Available

09 Aug 2017

Announcements

Proposed Dates for ICANN Public Meetings 2021–2023

Open Date: 21 AUG 2017 Close Date: 2 OCT 2017 Originating Organization: Meetings Team – Global Stakeholder Engagement...

21 Aug 2017  |  Civil Society, Technology, Announcement

Alexandra Kulikova to Head Stakeholder Engagement for Eastern Europe & Central Asia at ICANN

21 August 2017 – Today, the Internet Corporation for Assigned Names and Numbers (ICANN) announced that Alexandra Kulikova will take over for Michael Yavushev as Head of Global Stakeholder Engagement for Eastern Europe & Central Asia. She will...

21 Aug 2017

Request for Proposal: ICANN Designated Agent for Registrar Data Escrow Services

The Internet Corporation for Assigned Names and Numbers ("ICANN") is seeking to identify one or more additional ICANN-designated Registrar Data Escrow (RDE) agent(s) suitable to provide RDE services to accredited registrars. In 2007, the ICANN...

17 Aug 2017  |  Civil Society, DNS Marketplace, Technology, Announcement

Second Version of Label Generation Rules for the Root Zone (RZ-LGR-2) Released

ICANN is pleased to announce that the second version of Label Generation Rules for the Root Zone (RZ-LGR-2) has been released. RZ-LGR comprises of rules which define a set of criteria for determining valid Internationalized Domain Name (IDN)...

17 Aug 2017

BROWSE ALL ANNOUNCEMENTS

Multimedia

0

استعد بأنظمتك لتبديل مفتاح الدخول الرئيسي KSK للجذر

أما إذا لم تكن برامجك تدعم التحديثات التلقائية لمرتكزات ثقة امتدادات DNSSEC وهي (RFC 5011) أو كانت غير مهيأة لاستخدامه، فيجب عليك تحديث مرتكز ثقة البرمجيات يدويًا. يتوافر مفتاح KSK الجديد لمنطقة...

0

Подготовьте свои системы к обновлению KSK корневой зоны

Если ваше программное обеспечение не поддерживает автоматическое обновление якорей доверия DNSSEC (RFC 5011) или не настроено для этого должным образом, необходимо вручную обновить якорь доверия в...

Artworks 000231006375 g53ffd t500x500

Update on New gTLD Subsequent Procedures

ICANN Policy Analyst Ariel Liang speaks with Co-Chair Jeff Neuman of the Generic Names Supporting Organization (GNSO) Policy Development Process Working Group on the New Generic Top-Level Domain...

Artworks 000231005603 x2nubp t500x500

Recapping GNSO Activities at ICANN59 and Looking Ahead to ICANN60

The leadership of the Generic Names Supporting Organization (GNSO) Council speaks to ICANN Policy Analyst Ariel Liang, detailing the issues that have framed ICANN59 discussions, as well as the...

BROWSE ALL MULTIMEDIA

Blog Posts

Hero1 icann emea 750x467 23aug17 en

ICANN Middle East – One Year in Review

Taking APAC Space to the Next Level

Hero1 africa dns forum turns five 17aug17 en

The Africa DNS Forum Turns Five

BROWSE ALL BLOG POSTS

Sign Up to Get News Updates

Tell us which topics you care about and we'll send updates to your homepage and email.

Already have an Account? Sign In

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."