Regionstog A/S is a Danish railway company that took over the operation of the three private lines in Region Zealand, West Zealand Local Lanes, Østbanen and Lollandsbanen. It was established in 2009 when Vestsjællands Lokalbaner A/S, Østbanen and Lollandsbanen A/S where merged. Regionstog has administrative offices in Maribo and Holbæk. Lollandsbanen (Nakskov-Nykøbing F.), which is 50.2 km long, was opened in 1874 and transports approx. 875,000 passengers.