This unit is responsible for registering and maintaining .it domain names. This is done in accordance with "Rules of assignment and management of ccTLD .it domain names " with the principle of equity and equal access to the service set up by ICANN. This activity is conducted through an ongoing relationship with the Internet Service Providers (ISPs) that have an active contract with the Registry.

The main task of this unit is to support and guide those who come into contact with the Registry via the helpdesk (paper, email and telephone) and to look after the image of the Registry based on policies set by the Management Committee. The unit deals with the organization and the secretariat for the training courses and events sponsored by the Registry.

In 2008 the Registry launched a communication campaign aimed at promoting the dissemination of .it domain names and related services as a means of spreading the culture of the Internet. From the end 2009, this campaign communication will move into its "external" phase and become more visible.

The Systems Unit coordinates the planning and development of technologically innovative instruments to be used in the management of the ccTLD .it Registry; the maintenance and updating of the Registry network, of client-server systems and services given to Maintainers (website, DNS, e-mail, distribution lists, phone helpdesk, etc.); a service of technical helpdesk for maintainers and Internet end-users in general; management of hardware and software orders. The Systems Unit also carries out pure and applied research, and the experimentation of new technologies.

The International Relations Unit is responsible following and participating in international events regarding policies of domain name registration, in collaboration with international organizations. Through this unit the registry collaborates with and actively participates in the activities of international bodies which supervise aspects of Internet governance and which have contact with national domain name registries (ccTLD-country code Top Level Domain), in particular with ICANN and ISOC.

The Press Relations Office works within the External Relations, Media and Communications Unit. Its main aims is to promote the image of IIT, the Registry, and how they work, giving a wider and deeper knowledge of issues of public interest and social and maximum visibility to events of local, regional, national and international importance. Through its press office, the Registry provides direct support to editors and journalists wanting information regarding .it domain registrations, their dissemination, the services associated with them, and on how the Internet works.

Inside the External Relations, Media and Communications unit is the secretariat that organizes external and internal training courses:
- External training is given to Maintainers and Registrars that have an active contract with the Registry. It is organized in collaboration with the heads of other units, as regards course content, and where necessary with the project managers. The secretariat looks after both the logistical and operational aspects of the various courses, as well as preparing teaching materials, statements, and questionnaires for participants;

This unit is responsible for establishing and managing contracts for the registration of domain names in the ccTLD.it, from preliminary agreements, contract management, and debt recovery. The unit is also involved in the technical regulations and legislation on procedures for the registration and assignment of domains in the ccTLD.it by interacting with the Rules Committee. It decides on the practices relating to requests for accreditation of providers of non-judicial dispute resolution services, institutions accredited by the Registry to resolve disputes concerning domain names.

The editorial department was set up within the External Relations, Media and Communication Unit, with the aim to produce publications and information materials, both on paper and on the web. The products manufactured by the editors are: "Focus.it - Newsletter del Registro .it", the Statistical Yearbook, and the "quick guides" (to help Maintainers to understand registration procedures).

The Helpdesk offers first-level support - telephone, email or paper (conventional mail, fax) - and an indispensable guide to those who come into contact with the Registry and are interested in .it domain names. The activity of assigning and maintaining domain is on a national and European level. All adult citizens of the EU are legally permitted to have a .it domain. In fact, there are more than eight hundred thousand assignees of .it domain names to whom the External Relations unit offers direct support, even in the absence of a direct contractual relationship.