The Internet has become a worldwide phenomenon. It is undeniable that the Net has forcefully entered everyday life, ceasing to be a useful tool only for a small circle of researchers and academics, to become a new and versatile means of mass communication. And measuring Internet access and calculating the number of Internet users is not easy. By using the domain names registered in the “.it” as an endogenous metric, the Institute of Informatics and Telematics of the Italian National Research Council (IIT-CNR) carried out a research on Internet diffusion in Italy taking into account some major categories of users (enterprises, non-profit organizations, individuals, professionals and public bodies) and territorial distribution (nation, macro-area, region and province). This research has made it possible to carry out an initial analysis of the digital divide in Italy.