RCN subscribers streaming more data over Netflix and Amazon and also connecting more data-hungry devices such as smartphones and tablets to the internet, Fenger said. RCN, one of the nation's few so-called cable overbuilders that competes with incumbent local cable operators such as Comcast, serves the Delaware County towns of Clifton Heights, Upper Darby, Drexel Hill, and Yeadon, in addition to municipalities in the Allentown area. Fenger said that RCN has launched gigabit speeds in Chicago and Washington, too.