WNBH has often claimed to be one of the oldest broadcast radio stations in America; it has asserted that it was the 11th oldest in the USA, going back to May 21, 1921 ; but there is no evidence to support that assertion. According to the Department of Commerce records, WNBH received its license in November 1925.  When WNBH went on the air, it had its studios at the New Bedford Hotel, from whence it derived its call letters. WNBH's original station manager was a pioneer in amateur radio, Irving Vermilya.  Vermilya had put an earlier station on the air in New Bedford in May 1922, WDAU.  When WDAU's owners got out of the broadcasting business, Vermilya was asked to manage WNBH. In 1948 WNBH added FM service with WNBH-FM on 98.1 Megacycles (as the term was known at the time and later became Megahertz)/Channel 251 (now WCTK). The two stations are still co-owned to the present. WNBH is under ownership of Hall Communications and is currently an affiliate of ESPN Radio. The station is also an affiliate of the Pawsox Radio Network.