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Registry Agreements

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Base Registry Agreement – Updated 31 July 2017

Base Registry Agreement (Updated 31 July 2017) is also available in:
العربية | Español | Français | 日本語 | Português | русский | 中文

Note: The English language version of this Agreement (and all referenced specifications) is the official and controlling version and translations are provided for reference only.

Note: Includes two typographical edits further described in effective date email reminder to registry operators and footnotes of the redline versions.

2017 Global Amendment to the base Registry Agreement

The 2017 Global Amendment to the base New gTLD Registry Agreement is effective as of 31 July 2017. Please visit the Global Amendment webpage for additional information.

2017 Global Amendment to the base Registry Agreement is also available in:
العربية | Español | Français |日本語 | Português | русский | 中文

Authorizations for Release of Two-Character ASCII Labels

Please visit the Two-Character ASCII Labels webpage for additional information.

Authorization for All Digit/Digit, Letter/Digit, and Digit/Letter Two-Character ASCII Labels at the Second Level - 01 December 2014

Authorization for Release of All Digit/Digit, Letter/Digit, and Digit/Letter Two-Character ASCII Labels at the Second Level is also available in:
العربية | Español | Français | 日本語 | Português | русский | 中文

Authorization for Letter/Letter Two-Character ASCII Labels at the Second Level - 13 December 2016

Authorization for Release of Letter/Letter Two-Character ASCII Labels at the Second Level is also available in:
العربية | Español | Français | 日本語 | Português | русский | 中文

Base Specification 13 (.Brand TLD Provisions including Code of Conduct Exemption) – Updated 31 July 2017

Base Specification 13 (Updated 31 July 2017) is also available in:
العربية | Español | Français |日本語 | Português | русский | 中文

Name Collision Occurrence Management Documents

  • Base Assessment (4 August 2014): DOCX | PDF | HTML
  • SLD Controlled Interruption Variations (12 September 2014): HTML
  • Addendum to Name Collision Occurrence Assessment (14 November 2014): DOCX | PDF | HTML

Note: The Redline version reflects the updates from the previously posted version of the Base Registry Agreement. Please visit the Archived Registry Agreements webpage to view any previous Base Registry Agreements. The official Registry Agreement version is the Word version. The HTML version is machine-generated and may not display correctly.


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."