Segunda Federación, previously called Segunda División RFEF, also officially known as Segunda B-Segunda Federación, is the fourth tier of the Spanish football league system containing 90 teams divided into five groups. It is administered by the Royal Spanish Football Federation. It is the second tier outside the top two professional leagues, the Primera División (also known as La Liga) and the Segunda División, being behind the Primera Federación and above the Tercera Federación. The division also includes the reserve teams of a number of La Liga and Segunda División teams. From Wikipedia
