AKN Eisenbahn
 AKN Eisenbahn AG operates commuter and freight trains in Hamburg and Schleswig-Holstein. Its headquarters is in Kaltenkirchen. It is a member of the Hamburger Verkehrsverbund (HVV) which organises public transport in and around Hamburg.AKN is an abbreviation for Altona - Kaltenkirchen - Neumünster its first railway line.