Bernhard Wesely wrote, in October 2002:
For a domain-registration they require the following information: Billing Contact (usually the provider) Domain Owner (e.g. the company) Admin Contact (usually the IT-department of a Company) Tech Contact (technical contact, we always use the provider) Zone Contact (the one responsible for the DNS-Servers) Nameserver (the Nameservers) nic.at is capable of entering 5 nameservers per domain. There are no restrictions regarding the IP-Adresses of these Nameservers as long as they are not the same. If you have these informations, there is a webinterface, that can be found at www.nic.at, where you can enter all these Informations. Shortly after entering the date a script at nic.at checks the nameservers for the SOA records. If there are errors you get an e-mail containing an error-report. This means you have to enter the Resource Records into your nameservers before registering a domain. If the checks are done successfully, the domain will be entered in their nameservers (for example ns1.univie.ac.at). These nameserver are reloaded at: 10:00am, 1:30pm, 5:30pm and 10:00pm every day.
Bernhard Graf reported, in March 2005, that nic.at requires TCP service.