Skip to main content


Naela Sarras Appointed ICANN Vice President of Stakeholder Engagement in North America

LOS ANGELES – 17 September 2020 – Today, the Internet Corporation for Assigned Names and Numbers (ICANN) announced that Naela Sarras has been appointed Vice President of Stakeholder Engagement, North America. She is based in Los Angeles and...


ICANN69 Prep Week Schedule Now Available

LOS ANGELES – 15 September 2020 – Today, the Internet Corporation for Assigned Names and Numbers (ICANN) announced the ICANN69 Prep Week schedule. These 12 webinars are intended to help prepare the community for the ICANN69 Virtual Annual General...

ICANN org Responds to Digital Services Act Initiative Public Consultation Launched by European Commission

BRUSSELS – 10 September 2020 – The Internet Corporation for Assigned Names and Numbers (ICANN) announced on 8 September 2020 that the ICANN org has responded to the European Commission's public consultation on the Digital Services Act (DSA). The...

ICANN Launches Pandemic Internet Access Reimbursement Program Pilot

LOS ANGELES – 31 August 2020 – The Internet Corporation for Assigned Names and Numbers (ICANN) today announced the Pandemic Internet Access Program Pilot for ICANN69, following the ICANN Board's resolution in support of the pilot program. To...




ICANN's Julia Charvolen speaks with Community Excellence Award Recipient, Olivier MJ Crépin-Leblond

Julia Charvolen, ICANN Policy Development Support, sits down with Olivier MJ Crépin-Leblond, the 2020 Community Excellence Award Recipient.


ICANN Board Chair Maarten Botterman welcomes participants to ICANN68

Register and see the ICANN68 Virtual Policy Forum Schedule at:

Artworks yivdg19b4axerh0x e1pmzg t500x500

ICANN President & CEO Go?ran Marby Welcomes Participants To The ICANN68 Virtual Policy Forum.

ICANN President & CEO G?ran 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.


Blog Posts

ICANN Installs Root Server Cluster in Singapore


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"" — ????? — 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."