Skip to main content

Announcements

ICANN69 Governmental Advisory Committee Communiqué Now Available

HAMBURG, Germany – 23 October 2020 – Today, the Governmental Advisory Committee (GAC) of the Internet Corporation for Assigned Names and Numbers (ICANN) issued the ICANN69 GAC Communiqué. It is available for review here. Previous GAC advice and...

ICANN org Responds to the European Data Protection Board’s Public Consultation on the Board’s Guidelines on the Concepts of Controller and Processor

BRUSSELS – 19 October 2020 – The Internet Corporation for Assigned Names and Numbers (ICANN) announced today that it has responded to the European Data Protection Board's (EDPB) public consultation on its Guidelines 07/2020 on the concepts of...

Ramanou Biaou Honored with 2020 Dr. Tarek Kamel Award for Capacity Building

LOS ANGELES – 19 October 2020 – The Internet Corporation for Assigned Names and Numbers (ICANN) is honored to announce the first recipient of the 2020 Dr. Tarek Kamel Award for Capacity Building is Ramanou Biaou. The ICANN Board recognizes...

ICANN Publishes FY20 Financial Results

LOS ANGELES – 15 October 2020 – Today, the Internet Corporation for Assigned Names and Numbers (ICANN) announced financial results for the fourth quarter of the financial year ending 30 June 2020, which reflects ICANN's unaudited financials for...

BROWSE ALL ANNOUNCEMENTS

Multimedia

0

(English Subtitles) 2020 Dr. Tarek Kamel Award for Capacity Building

ICANN's Alexandra Dans interviews the first recipient of the 2020 Dr. Tarek Kamel Award for Capacity Building, Ramanou Biaou.

0

(French) 2020 Dr. Tarek Kamel Award for Capacity Building

ICANN's Alexandra Dans interviews the first recipient of the 2020 Dr. Tarek Kamel Award for Capacity Building, Ramanou Biaou.

Artworks yivdg19b4axerh0x e1pmzg t500x500

ICANN President & CEO Göran Marby Welcomes Participants To The ICANN68 Virtual Policy Forum.

ICANN President & CEO Göran Marby welcomes participants to the ICANN68 Virtual Policy Forum, ICANN's second virtual meeting.

Artworks pi5dfidq3dnhpvax cxk00q t500x500

ICANN Board Chair Maarten Botterman Welcomes Participants To ICANN68

Maarten Botterman, ICANN Board Chair, welcomes participants to the ICANN68 Virtual Policy Forum.

BROWSE ALL MULTIMEDIA

Blog Posts

Thank You for a Successful ICANN69

Recognizing ICANN Community Contributions in 2020

Hero1 disspain 20 years 750x460 21oct20 en

2020 Hindsight After 20 Years

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

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."