Area code 219 serves northwestern Indiana, including cities such as Gary, Hammond, Merrillville, Valparaiso, and Michigan City. It is one of the original area codes established in 1947 and was originally assigned to the entire northern third of Indiana. In 2002, it was reduced in size when area codes 574 and 260 were created to serve the central and eastern parts of northern Indiana. The 219 region remains a key industrial and residential zone adjacent to the Chicago metropolitan area. Known for its steel production, manufacturing, and Lake Michigan shoreline, 219 has a strong regional identity and continues to serve as a bridge between Indiana and the greater Chicago economy.