This paper examines the enactment of the Information Infrastructure for the management of migrants in Italy. The recent migration crisis required e-government tools to deal with the management of migrants in Italy, and this paper critically explores how the relevant Italian Authorities put in place a purpose-built government solution, the Information Infrastructure, to better manage and allocate migrants in the Italian Territory. This work closely focuses on the functionalities enacted in the Information Infrastructure, and critically analyses its main characteristics and interoperability. This research derives from a case study which enables the phenomenon to be explored from multiple sources and angles. The findings are explored through the lens of the assemblage framework, which helps to uncover the real nature of this Information Infrastructure, identifying it as an assemblage, a heterogeneous composite which results from the encounter of technology with a spectrum of socio-technical dimensions. Looking at this Information Infrastructure as an assemblage will help to unveil the role of mediation between the various interests and dimensions in the making of the assemblage. In particular, we will argue that the interplay of dimensions has led to an Information Infrastructure that is suboptimal and imperfect by contrast with the original plans because some dimensions fail to recognize the effects of the others. Moreover, we aim to demonstrate that the attempts to design an assemblage that is fully controllable a priori failed because an assemblage is always in-the-making and needs to be continuously cultivated by its actors.