"WNUV, digital channel 40, is an affiliate of the CW Television Network, located in Baltimore, Maryland. WNUV is owned by Cunningham Broadcasting, but is operated by Sinclair Broadcast Group through a local marketing agreement (LMA) with Fox affiliate WBFF (channel 45). However, WNUV is effectively owned by Sinclair due to Cunningham's financial structure (see below). The two stations share studios and office facilities in the Woodberry section of Baltimore. WNUV's analog transmitter is located near Gilson Park in Catonsville, Maryland, while its digital transmitter is located on Television Hill in Woodberry.

WMAR-TV first began broadcasting on October 27, 1947.[1] It was the eleventh television station in the United States, and the first in Maryland. It was owned by the A.S. Abell Company, publisher of the Baltimore Sun, along with the original WMAR-FM (97.9 MHz, now WIYY). Channel 2 was originally an independent station, largely because at the time it was not clear whether Baltimore would be part of the Washington, D.C. market. Baltimore is 45 minutes north of Washington, and most of the Washington stations decently cover Baltimore. In 1948, however, the Federal Communications Commission made Baltimore a separate market. Soon afterward, WMAR-TV joined CBS as the network's second affiliate. One of channel 2's early personalities was Jim McKay, who later moved over to CBS before achieving greater fame on ABC as host of Wide World of Sports and Olympics coverage."

-Wikipedia