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.ORG Agreement Appendix 6

List of Reserved TLD Strings

(1 March 2012)

Registry Operator shall reserve names formed with the following labels from initial (i.e. other than renewal) registration within the TLD:

A. Labels Reserved at All Levels. The following names shall be reserved at the second level and at all other levels within the TLD at which Registry makes registrations:

ICANN-related names:

  • aso
  • gnso
  • icann
  • internic
  • ccnso

IANA-related names:

  • afrinic
  • apnic
  • arin
  • example
  • gtld-servers
  • iab
  • iana
  • iana-servers
  • iesg
  • ietf
  • irtf
  • istf
  • lacnic
  • latnic
  • rfc-editor
  • ripe
  • root-servers

B. Additional Second-Level Reservations. In addition, the following names shall be reserved at the second level:

  • All single and two-character labels that were previously reserved by the Registry in the Registry Agreement may be allocated through ICANN-accredited registrars, based upon implementation of a phased allocation program as further set forth in Appendix 7. The reservation of a two-character label string shall be released to the extent that the Registry reaches agreement with the government and country-code manager, or the ISO 3166 maintenance agency, whichever appropriate. The Registry may also propose release of these reservations based on its implementation of measures to avoid confusion with the corresponding country codes.

C. Tagged Domain Names. All labels with hyphens in the third and fourth character positions (e.g., "bq--1k2n4h4b" or "xn--ndk061n")

D. Second-Level Reservations for Registry Operations. The following names are reserved for use in connection with the operation of the registry for the .org TLD:

  • nic
  • whois
  • www
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."