Generic Top-Level Domain (gTLD) Registry Agreements

gTLD Registry Agreements establish the rights, duties, liabilities, and obligations ICANN requires of registry operators to run gTLDs.

Unsponsored TLD Agreement: Appendix K (.pro)

ICANN | Unsponsored TLD Agreement: Appendix K
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Unsponsored TLD Agreement: Appendix K (.pro)

Posted: 16 July 2009

Schedule of Reserved Names

Except to the extent that ICANN otherwise expressly authorizes in writing, the 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 Operator makes registrations:


  • aso
  • dnso
  • icann
  • internic
  • pso

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:

  • .aero
  • .arpa
  • .asia
  • .biz
  • .cat
  • .com
  • .coop
  • .edu
  • .gov
  • .info
  • .int
  • .jobs
  • .mil
  • .mobi
  • .museum
  • .name
  • .net
  • .org
  • .pro
  • .tel
  • .travel

* 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 C, Section 12.

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

D. Second-Level Reservations for Registry Operations. The following names are reserved for use in connection with the operation of the registry for the Registry TLD. They may be used by Registry Operator under Subsection 3.6.1, but upon conclusion of Registry Operator's designation as operator of the registry for the Registry TLD they shall be transferred as specified by ICANN:

  • nic
  • whois
  • www

Earlier drafts:

21 May 2004
26 April 2001
25 April 2001
3 March 2001

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Page Updated 30-Jul-2009

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