WIVB-TV (channel 4) is a television station in Buffalo, New York, United States, affiliated with CBS. It is owned by Nexstar Media Group alongside CW owned-and-operated station WNLO (channel 23). WIVB-TV and WNLO share studios on Elmwood Avenue in North Buffalo; through a channel sharing agreement, the two stations transmit using WNLO's spectrum from a tower in Colden, New York. However, master control and some internal operations are based at Springfield, Massachusetts–licensed Nexstar sister station and NBC affiliate WWLP's studios in Chicopee.