Skip to main content

Announcements

Proposal for Korean Root Zone‬ Label Generation Rules - Second Public Comment

Open Date: 2 March 2021 Close Date: 15 April 2021 Originating Organization: Global Domains and Strategy (GDS) Categories/Tags: Second-Level Domains Brief Overview: The Korean community has formed...

ICANN72 Fellowship Application Round Now Open

LOS ANGELES – 1 March 2021 – Today, the Internet Corporation for Assigned Names and Numbers (ICANN) is opening the application round for the ICANN Fellowship Program taking place at the ICANN72 Annual General Meeting from 23-28 October 2021 in...

Schedule for ICANN70 Virtual Community Forum Now Available

LOS ANGELES – 1 March 2021 – The Internet Corporation for Assigned Names and Numbers (ICANN) has released the schedule for the ICANN70 Community Forum, 22-25 March 2021. Initially planned for Cancún, Mexico, the meeting will take place virtually...

ICANN Terminates Registrar Accreditation Agreement (RAA) with Net 4 India Limited

LOS ANGELES – 26 February 2021 – Today, the Internet Corporation for Assigned Names and Numbers (ICANN) announced the termination of the Registrar Accreditation Agreement (RAA) with Net 4 India Limited as a result of its failure to cure multiple...

BROWSE ALL ANNOUNCEMENTS

Multimedia

0

Maarten Botterman and León Sánchez on the ICANN Board’s Priorities

ICANN Board Chair Maarten Botterman and Vice Chair León Sánchez discuss the Board’s key operational priorities, and how they are managed.

0

Happy Holidays from the ICANN Board

As we take a moment to reflect on this past year, we can be proud of the work we accomplished and the goals we met. We are confident that ICANN is starting 2021 not only equipped with the tools for...

Artworks wydd138mzyqglby6 fiizgq t500x500

(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.

Artworks wydd138mzyqglby6 fiizgq t500x500

(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.

BROWSE ALL MULTIMEDIA

Blog Posts

EU Initiatives Relevant to the DNS and DNS Service Providers: Feedback Period Still Open

Chair’s Blog: Recap of the January Remote Board Workshop

DAAR Activity Project: Now Providing Personalized Monthly Reports for ccTLDs

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."