Company: Keystone Outdoor Advertising Markets: New Jersey, Pennsylvania. Headquarters: PO Box 202, Cheltenham, PA 19012-0202 Phone: (856) 767-5028 Keystone Outdoor is a operates a billboard plant which targets bridges, expressways and suburban roads in Southern New Jersey, Trenton and Philadelphia. The privately-held firm was started in 1977 by Dominick Cipollini when he secured […]
