This document describes the past and ongoing attempts of int:net consortium members to establish a sound community that jointly drives interoperability in the energy system. This Interoperability Community can rely on a sound basis of interested members of the int:net Community which has been developed in the second half of the int:net project time. The community can also rely on a rich heritage of the project, i.e, a set of practical tools and guidelines. Looking ahead, the report outlines plans of each consortium member for the time after the end of the project, emphasizing the use of a newly established knowledge and collaboration platform.