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Do You Have a Domain Name? Here's What You Need to Know

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New Registrant Content and Blog Added

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See new content and read the latest blog from our educational series that is part of ICANN's broader efforts to help registrants better understand the ICANN policies that affect them. Learn more about the registrant’s role in the Domain Name System (DNS), and the role of the ICANN organization, registries, and registrars in the DNS ecosystem.

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ICANN63 By the Numbers Report Now Available

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The ICANN63 By the Numbers Report includes technical, demographic, and attendance statistics for the recent ICANN Public Meeting in Barcelona, Spain. The report is part of ICANN org’s commitment to transparency and is in support of ICANN’s multistakeholder model. By leveraging this data, the org hopes to improve engagement with Public Meetings.

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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."