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.AT is the official country code Top-Level-Domain (ccTLD) of Austria. An .AT Domain is normally used by companies or private entities who are located in Austria or who have business relationships with Austria.



Allowed TLDs



Dispute Policy



1api GmbH



24 hours

Min. Characters


Max. Characters


Character Set
  • Letters and numbers
  • Hyphens ("-"), however not at the beginning or directly in front of the TLD
  • IDN: allowed
  • Registrant Contacts: Required: 1 / Maximum: 1
  • Admin Contacts: Required: 0 / Maximum: 1
  • Tech Contacts: Required: 1 / Maximum: 2
  • Billing Contacts: Required: 0 / Maximum: 1

{{{Possible Extensions}}}

IDN capable


Restore capable


Handle Updates

Supported (partially)

Registration System


Allowed number of NS

2 to 8

Registry Nameservercheck


Host IP-Addresses Type

IPv4 / IPv6

Hosts managed as


Root Nameserver Update

4 times a day

SEC DNS Interface

DS data interface



Transfer Periods


Transfer Authcode required


Transfer Real-Time


Transfer Lock


Owner Change by


Trade Real-Time


Transfer included


Trade ACK by


Trade NACK by


Domain Registration

Domains can be registered in Real-Time with the API AddDomain command.

command = AddDomain
domain  = (DOMAIN)


ownercontact0 = (CONTACT)
admincontact0 = (CONTACT)
techcontact0 = (CONTACT)
billingcontact0 = (CONTACT)
nameserver0 = (NAMESERVER)
nameserver1 = (NAMESERVER)


auth = <TEXT> | <NULL>
transferlock = 0 | 1 | <NULL>
subuser = <TEXT> | <NULL>

Domain Transfer

The transfer has to be initiated by the gaining registrar and can be requested with the API TransferDomain command.
A valid Authorization Code must be provided to initiate a transfer successfully. You may obtain the authorization code from the losing registrar.
Domain transfers are processed in Real-Time.

In case that you our your client does not have access to his mailbox anymore the transfer can be confirmed alternatively via fax. The fax can be downloaded direcly on the NIC.AT´s Website Please fax this form directly to NIC.AT +43 662 46 69-29

command = TransferDomain
domain = (DOMAIN)


auth = <TEXT> | <NULL>


subuser = <TEXT> | <NULL>
period = <PERIOD>
transferlock = 0 | 1 | <NULL>

Delete Domain

Domains can be deleted with the API DeleteDomain command.
There is a Deletion Restorable Period of 60 days and a following Deletion Hold Period of 59 days.

command = DeleteDomain
domain = (DOMAIN)


subuser = <TEXT>

Restore Domain

Restores can be processed in realtime. A restore is possible within 60 days upon deletion. Please use the command RestoreDomain.

command = RestoreDomain
domain = (DOMAIN)


renewalmode = <NULL> | <TEXT>
subuser = <TEXT>


An Ownerchange is free of charge and can be done with the API ModifyDomain command.

In order to change the registrant of an .AT domain you have to

  1. Use the TradeDomain command, or the Trade function in our web interface to assign the new owner contact handle to the domain
  2. Visit our .AT ownerchange form generator at to generate a fax form
  3. Follow the instructions on the generated fax form. The update will then be processed.
  4. Please note that the OwnerChange can only be executed as soon as we have received the signed Ownerchange form.
  5. If you are a RegistrarOC customer, you need to activate the domain trade by using the API command ActivateDomainTrade after your customer initiated it.

Special Terms and Conditions

AT nameserver-udates are done 5-times a day. At 06:00, 10.00, 13.30, 17.30 and 22.00 (CET).

DISCLOSE parameter for the AddContact / ModifyContact command

Per default all contact handle parameters are visible in public whois of To not disclose some parameters (like voice, fax, email) you have to set the
DISCLOSE parameter to "0" (default value is "1").

To not disclose all possible parameters (voice, fax, email) set this parameter to "0"


To not disclose voice phone number set this parameter to "0"


To not disclose fax phone number set this parameter to "0"


To not disclose email address set this parameter to "0"

Notification emails to registrant / tech contact:

Please notice that in case of the change of registrant or tech contact the registry sends an email to the old and the new contact.

email notification for change of registrant:

From: [email protected]
Subject: Update Inhaberdaten/Owner data:
Dear domain holder! is the registry for .at-domains.

The domain holder's data of domain have been modified.
You can find the current data in the WHOIS view on
For further questions please contact your provider.

A new domain certificate will also be issued in case of a change of registrant and a notification email will be sent to the new registrant:

From: [email protected]
Subject: Zertifikat:
Dear Madam or Sir!

In the name of, the registry for .at domains, we want to thank you for registering
or taking over a .at, or domain.

To certify the ownership of your domain, we offer you a domain certificate to download on
our website at the following URL:

By registering or taking over an .at domain, you have concluded a contract with,
even if the domain has been registered with an ISP / registrar and may be accounted by
This contract is based on the General Terms & Conditions of which can be found

To view the certificate, you need a programme to read PDF files (e.g. Adobe Acrobat Reader
which can be downloaded for free at:

If you have any questions concerning domain administration, please contact your ISP /

email notification for change of tech contact:

From: [email protected]
Subject: tech-c info:
Dear Madam or Sir!

You are receiving this e-mail, because you were specified as the
Tech-c of the domain and this contact has been updated.
This usually occurs along with a change of the ISP or nameservers.
If this is the case, please make sure that your nameservers do no
longer refer to the domain or that the data is
changed accordingly.
Thank you!

Special deletion information

You can choose, if the registry should delete the domain immediately or at the end of its term with the following extension:

X-AT-SCHEDULEDATE = expiration | now 

Indicates, if the registry should delete the domain at the end of its term ("expiration") or immediately ("now"). If the parameter is not given the domain will be deleted at the end of its term.

If you do not have the consent of the registrant you should set the domain renewal mode to AUTOEXPIRE. This will cause a so-called BILLWITHDRAW at the registry at the end of the term of the domain. A BILLWITHDRAW means that the registrant will become the new billing contact of the domain and will be charged directly from the registry for the renewal of his domain.
As the .AT registry handles domain-deletions very strict, we highly recommend to save a written confirmation of your client for domain-transactions. In case that you have to delete domains immediately, e.g. in case of fraud, the only way is to delete the domain with the API DeleteDomain command and setting the parameter X-AT-SCHEDULEDATE to "now".

Please note that you're only allowed to delete .AT domains directly if you have the signed authorization of the registrant. The cancellation-form is available for download here:


If the domain was deleted explicitly with the DeleteDomain command or set to "AUTODELETE".

Restores are not possible if the domain was set to "AUTOEXPIRE" or was pushed back to the registry with the PushDomain command. In order to get your domain back, please request a transfer via API or Controlpanel. Please note that as soon as you have requested a transfer, NIC.AT will send out a confirmation email to the domain-owner to confirm the transfer. A second alternative would be to contact NIC.AT directly and ask them for a manual confirmation.

Restore Process

To restore a domain as a RegistrarOC customer, you simply have to execute the RestoreDomain command. HEXONET directly forwards the restore request to the registry, which performs the restore in real-time. As soon as the restore is complete, the domain will get assigned to your account with the original domain data.

Please do not initiate a restore directly at the registry (e.g. using the registrar webinterface). All restore operations must be performed through our system.