The FinnRef network is the national first order CORS (Continuously Operating Reference Station) network defining the first order of the national ETRS89 realisation (EUREF-FIN). The FinnRef was established in 1990’s and it was modernised and densified to 20 stations in 2012–2014. The network will be densified to 50 stations in 2017–2018. The FinnRef network has a key role in maintaining the EUREF-FIN. Part of the stations belong to the global IGS network and to European wide EPN network creating the connection to the international reference frames.