EuCNC 2017 is the 26th edition of a successful series of a technical and scientific conference open to the world research community, sponsored by the European Commission, in the area of Telecommunications, focusing on communication networks and systems, and reaching services and applications. It aims at showcasing the results of the consecutive programmes on R&D and projects co-financed by European programmes, as well as presenting the latest developments in this area. The conference will have regular oral and poster sessions, and well as panels, tutorials, workshops, keynotes, and demos.