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ICANN Signs Service Level Agreement with Regional Internet Registries and Finalizes 2016 Supplemental Agreement with Internet Engineering Task Force

Today the Regional Internet Registries (RIRs) and the Internet Corporation for Assigned Names and Numbers (ICANN) signed the Service Level Agreement (SLA) for the IANA Numbering Services at ICANN56 in Helsinki, Finland. This agreement will become effective on the date of the transition. To read more and review this agreement, which documents the planned arrangements for provision of IANA numbering services after the IANA Stewardship Transition, please visit here.

ICANN also finalized a Memorandum of Understanding (MoU) Supplemental Agreement with the Internet Engineering Task Force (IETF) for the performance of the protocol parameters functions. This is one of the requirements of the IANA Stewardship Transition package of proposals. This agreement will become effective on the date of the transition. Review the MoU Supplemental Agreement here [PDF, 159 KB].


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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."