The Intercity-Express (written as InterCityExpress in Austria, Denmark, Switzerland and, formerly, in Germany) or ICE (German pronunciation: [iːtseːˈʔeː]) is a system of high-speed trains predominantly running in Germany and its surrounding countries. It is the highest service category offered by DB Fernverkehr and is the flagship of Deutsche Bahn. The brand name "ICE" is among the best-known in Germany, with a brand awareness close to 100%, according to DB.