Several authors have contended recently that the rationality of contemporary migration control can be most adequately grasped by the notion of 'containment', conceived as the redirection of people's autonomous movement into restricted and defined pathways. Following this idea, this article proceeds in three steps. First, it proposes an analysis of the 'infrastructures' through which containment is enforced, showing the plural dimensions (regulatory, humanitarian, commercial, social) of which they are composed. Second, analysing two cases of transnational mobility towards (and across) the EU, it shows the effect of containment on people's spatial and existential trajectories. And third, through the analysis of such cases, it contends that the ultimate effect of containment is the fragmentation of citizenship into a variety of intermediate 'latitudinal' positions characterised by partial and conditional access to rights, which are functional to several forms of exploitation, including labour but also profit extraction through the operations of containment infrastructures themselves.