Channel 7 first went on the air on June 21, 1948 as WNAC-TV, the second television station in Boston (twelve days after WBZ-TV). It was owned by General Tire along with WNAC radio (680 AM, now WRKO), flagship of the Yankee Network, a New England regional radio network. General Tire had purchased the Yankee Network in 1943. WNAC first broadcast from studios at 21 Brookline Avenue (which had also been home to WNAC radio and the Yankee Network) before moving to its current facilities at 7 Bullfinch Place near Government Center in 1968.