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.ac ccTLD logo.png
Introduced19 December 1997
TLD typeCountry code top-level domain
RegistryAscension Island Network Information Centre (run by Internet Computer Bureau)
SponsorCable and Wireless (Ascension Island)
Intended useEntities connected with Saint Helena, Ascension and Tristan da Cunha
Actual useVarious uses, sometimes connected to education and academia; a few sites actually on Ascension Island
Registration restrictions2nd-level registrant must have professional or academic qualification; 3rd level registrant must be resident on Ascension Island
StructureRegistrations are taken directly at the second level or at third level beneath various 2nd-level labels
DocumentsTerms & Conditions; Rules
Dispute policiesDispute Resolution Policy
Registry websiteNIC.AC

The .ac top-level domain is the Internet country code (ccTLD) for Saint Helena, Ascension and Tristan da Cunha, and primarily for Ascension Island. It is administered by NIC.AC, a subsidiary of the Internet Computer Bureau based in the United Kingdom.

Registration for the domain is open to anyone. The registry accepts registrations of internationalized domain names.[1]

The domain is marketed by some domain-brokers as a domain for the city of Aachen, Germany, after the automotive license plate designation ("AC") for the city.

Use as an abbreviation for "academic"[edit]

Due to its similarity to the .ac ("academic") second-level domain that exists under some country code top-level domains, some educational institutions also register under the .ac top-level domain:

Other uses[edit]

  • On 10 December 2013, The Pirate Bay switched to an .ac domain.[11]
  • .ac is being used by anti-cheat software Easy Anti-Cheat.[12]
  • .ac is occasionally used as an abbreviation for activities and/or accommodation by tourism websites.[13]

See also[edit]


  1. ^ "IDN Code Points Policy for the .AC Top Level Domain" (PDF). nic.ac. 2013-05-20. Archived from the original (PDF) on 2014-08-06. Retrieved 2013-05-23.
  2. ^ "University of Kurdistan Hewlêr". Archived from the original on 2012-10-30. Retrieved 2009-04-01.
  3. ^ "Collegium Ralstonianum apud Savannenses - New Website Under Construction". Archived from the original on 2019-04-16. Retrieved 2021-03-30.
  4. ^ "Faith Marketing Business Consulting | Faith Based Marketing". Archived from the original on 2021-01-22. Retrieved 2021-03-30.
  5. ^ "University of Edinburgh". edin.ac.
  6. ^ https://switch.ac[permanent dead link]
  7. ^ "Home - Mahidol Oxford Tropical Medicine Research Unit". Archived from the original on 2021-03-08. Retrieved 2021-03-30.
  8. ^ "New Religious Movements - Latest news from Inform | Inform". Archived from the original on 2021-03-09. Retrieved 2021-03-30.
  9. ^ "Newcastle". Archived from the original on 2019-09-21. Retrieved 2012-01-17.
  10. ^ "DIU | Dhaka International University". Retrieved 2021-08-04.
  11. ^ "The Pirate Bay Moves to .AC After Domain Name Seizure". 2013-12-10. Archived from the original on 2013-12-10. Retrieved 2013-12-10.
  12. ^ "Easy Anti-Cheat". Archived from the original on 2021-02-17. Retrieved 2021-03-28.
  13. ^ ""Melbourne - Activities & Accommodation"". Retrieved 2021-06-04.

External links[edit]