Skip to main content

KSK Rollover

Looking for more details on the upcoming root KSK rollover? ICANN has published a detailed document outlining what to expect during the rollover process and how to better prepare.

Read now

News and Announcements

Participate Now in the Sunrise and Trademark Claims Survey

Thumb rpm review sunrise tm claims 1200x630 06sep18 en

The Sunrise and Trademark Claims survey is now available for individuals interested in sharing their feedback about these Rights Protection Mechanisms (RPMs). This feedback will be essential to the evaluation of these Rights Protection Mechanisms and ICANN's data collection efforts related to them.

Stay Informed on EPDP Team Deliberations

Thumb epdp stay informed feature

Keep up with the fast-moving Expedited Policy Development Process (EPDP) Team on Temporary Specification for gTLD Registration Data. Learn about the variety of ways you can follow the progress of the EDPD Team including updates during the ICANN63 Public Meeting.

Moving Forward with Registration Data Access Protocol (RDAP)

Thumb moving forward rdap 1563x886 04sep18 en

Developed by the technical community as an eventual replacement for the WHOIS protocol, RDAP enables users to access current registration data. On 31 August 2018 a set of documents was posted for Public Comment that represent a step forward in the community's work on the Registration Data Access Protocol (RDAP).

APAC Regional Office 5th Anniversary Report Out Now

Thumb apac5 feature 492x279

ICANN Asia Pacific regional office has produced a report to commemorate its 5th anniversary. It showcases the APAC community participation in ICANN as well as members who have taken up leadership positions in ICANN in the past year. Read about these and more in the report and share using #APAC5.

View all
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."