This article describes the procedures and requirements of .ac domain names.
Click on the subject below to open the dropdown for more information.

You can register a .ac domain through our API or control panel. This registration is real time and requires the following information:
  • the domain's contact handles (owner, administrative, etc.)
  • two or more nameservers or a nameserver group
A transfer is initiated with an authorization code which is provided by the current provider. The transfer is finished nearly realtime. The domain registration will be extended by a year.

Additional notes on a .ac transfer

The first 60 days after a new registration or transfer, a domain cannot be transferred to another registrar again.
Authorization code required yes
Method of confirmation authcode
Registration period after transfer extends
Average transfer time Realtime
Advanced and simple transfers available Contact our Sales department to check if easy transfer of 100 or more .ac domains is available.

Owner change (trade)

An owner change can be performed by updating the owner handle of the domain. This change is processed realtime.

Other update

An update is processed realtime. Nameservers are instantly updated in the registry zonefile.


A delete is realtime. After a delete the domain will be in quarantine status for 30 days. During this period the domain is inactive but can be reactivated. If the domain is not reactivated within 30 days the domain will be free for registration again.

Restore / reactivate

A domain in quarantine status can be reactivated during 30 days. A reactivation is realtime.
  • Registry: NIC AC
  • Registry whois: whois.nic.ac
  • Registry web based whois: http://www.nic.ac/
  • Registry zonefile updates: Real-Time
Technical information
  • DNSSEC support: no
  • Minimum length: 3 characters
  • Maximum length: 63 characters
  • Allowed characters: a-z 0-9 -
  • IDN characters: yes, http://www.nic.ac/pdf/AC-IDN-Policy.pdf
  • Registration period: 1-10 years
  • Renewal date offset: 0 days
    The number of days before the registry's expiration date, that Openprovider requires the domain to be renewed or expired. More info.
    Note that the dates as shown in your Openprovider account are always leading, even if they do not match the renewal date offset mentioned here.
  • Soft quarantine period: n/a days
    During this period, following after an expiration, the domain can be restored for free. This period does not apply if the domain is deleted explicitly. More info.
  • Quarantine period: 0 days
    During this period, an expired or deleted domain name can be reactivated at an additional fee.
  • Local presence required? no
  • Does Openprovider provide local presence services? n/a
  • Local activity required? no
  • Correct nameserver configuration required? no
  • No requirements
Registration agreement The registry requires that a registration agreement is in place between the provider and the domain holder. The text of this registration agreement and any required supplements is the following:
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