Owned by Westchester Broadcasting Corporation, WFAS first signed on in 1932 from the Roger Smith Hotel, on the corner of Post Road and Chester Street in White Plains, NY. It broadcast 100 watts on a frequency of 1210 kHz from a T top antenna on the roof of the hotel. Prior to that, the station used the call sign WCOH in Yonkers (Westchester Broadcasting Corporation) and WBRS in Brooklyn (North American Broadcasting Corporation). The 1210 kHz frequency was a time share with WBRB; Long Branch, New Jersey, WGBB; Freeport, New York and WGNY; Newburgh, New York.

In 1941, in accordance with the NARBA treaty, the station moved to 1240 kHz and increased power to 250 watts, still sharing the frequency with two other stations. By March of 1943, the station had moved to 1230 kHz on a full-time exclusive basis.

In 1947, the transmitter site was moved to its current location on Secor Road in the Town of Greenburgh. Concurrent with that move, WFAS-FM signed on from the same location. The T top antenna continued to be used as an auxiliary while the studios remained at the Roger Smith Hotel.

In 1948, WFAS and WFAS-FM moved to new studios and offices in the building of the White Plains Reporter Dispatch. By 1954, the studios had moved out of the City White Plains into the Secor Road location. In 1963, the station increased power to 1,000 watts.

In 2014, WFAS-FM changed call sign to WNBM, moved its transmitter site to the Bronx and studios to Penn Plaza in Manhattan.

Programming