DZRH (666 AM) is a radio station owned and operated by Manila Broadcasting Company, which serves as the flagship station. The station's studio is located at the MBC Building, Star City, Vicente Sotto St., CCP Complex, Roxas Boulevard, Pasay; while its transmitter is located along I. Marcelo St., Brgy. Malanday, Valenzuela. The station has nationwide coverage through its relay stations located across the Philippines. Established on July 15, 1939, DZRH is the oldest private radio station, and the second oldest radio station in the Philippines, after the government-owned DZRB.