Planet Sub (or Yello Sub) is a growing fast food restaurant based in Kansas City, Missouri. They are expanding with emphasis on franchising the brand in the United States of America. As of 2013, they have 18 corporate stores and 17 franchise locations, with 26 additional franchise units in development. Open markets include: Kansas City, Topeka, Wichita, Lawrence, Warrensburg, Des Moines, St. Louis, St.