Skip to main content





  • レジストラは、レジストラデータエスクロープログラム ページのリストから新レジストラDEAを選択します。
  • レジストラは、レジストラDEA変更リクエスト [PDF, 173 KB] フォームに記入し、 registrarupdates@icann.orgに電子メールで提出します。
  • レジストラは、新レジストラDEAに連絡し、レジストラデータエスクロー契約(RDEA)の締結を開始します。RDEAは最初にレジストラに、次に新レジストラDEAに、そして最後にICANN組織に送信され、署名されます。ICANNが承認した、すべてのレジストラDEA向けのRDEAテンプレートは、レジストラデータエスクロープログラムページで確認できます。
  • 完全に契約が締結されたRDEAを受け取ると、レジストラは新DEAとの委託を開始し、現DEAとの委託も継続します。
  • レジストラは、新DEAとの完全な委託が最初に成功したら、ICANNに通知します。
  • 確認後、ICANN組織はすべての当事者に移転通知を送信し、前のRDEAが終了し、レジストラが前DEAとの委託を停止できることを確認します。


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"""" is not an IDN."