The station was assigned the call letters WCNH on September 19, 1989. On March 15, 1994, the station changed its call sign to WNHI then on February 4, 2005 to the current WNHW. WNHI, which went on the air May 8, 1994, was originally known as I-93 (referring to Interstate 93) with a classic rockradio format, which moved to co-owned WWHK/WWHQ in 2005 and is currently heard on WLKZ. Prior to the format swap, the country music format originated on WWHK as WOTX-FM ("Outlaw 102.3").
Its signature voice is John Willyard, voice of the CMA Awards since 1996, whose voice work is heard on many country music stations across North America.