Skip to main content

Welcome to the new! Learn more, and send us your feedback. Dismiss

Provide Input

Please provide feedback on the highly anticipated IANA Stewardship Transition & Enhancing ICANN Accountability Proposals. The ICG & CCWG-Accountability seek your input on these key proposals. Click the link above to learn more & submit your feedback.

Click Here for More Information

News and Announcements

Explore the New IDN Infographic

Image of People talking in different languages

Internationalized Domain Names (IDNs) allow people around the world to access domain names in their local language. Click on the link and download the new infographic to learn more about IDNs and how you can participate in ICANN’s IDN program.

Q4 Stakeholder Call Report Available Now

Fadi discussing Quarterly Call

ICANN held its FY15 Q4 Stakeholder Call on 20 August. Click on the link above to view the recording and slides from the 20 August call as well as archives from previous Quarterly Stakeholder Calls.

ICANN CEO Search Committee Announces CEO Candidate Criteria

ICANN Logo - Deadline for CEO Application Submissions: 20 Sept 2015

Learn the criteria and characteristics the ICANN CEO Search Committee is looking for in CEO Candidate applicants. All applications must be submitted by the 20 September 2015 deadline. Find out more about how to submit an application by clicking the link above.

Register Today for ICANN54 in Dublin

ICANN54 Dublin Graphic

ICANN’s 54th Public Meeting will take place in Dublin, Ireland from 18-22 October 2015. ICANN meetings are a great opportunity to participate in Internet policymaking, learn more about ICANN topics and help share the Internet’s future. Register for ICANN54 today by clicking the link above.

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."