"Switzerland has only one single Flight information region (FIR), which is divided into the areas of authority Zürich and Geneva (Genf). The borderline of the areas is coming from Chasseral over the Berner Oberland to finally Fiesch and is named CTA Zürich and CTA Genf. (...)" (translated by Denglisch) http://www.shv-fsvl.ch/fileadmin/redakteure/PDFs/Sicherheit/Luftraum/Dokus/Luftraum_2012_2.pdf
ICAOCODE: LSAS Region: EUR Location: Genf and Zürich