The station began carrying the Boston-based Howie Carr Show in late afternoons on February 16, 2015.

[5] The call sign was chosen because the original owner was the Twin State Network, which owned radio stations in both New Hampshire and Vermont.

In August 2015 WTSN and its sister station WBYY announced plans to join with Aruba Capital Holdings's WXEX and Port Broadcasting's WNBP and WWSF to form Coastal Media Partners, with Port Broadcasting management assuming immediate oversight of WTSN and WBYY.

[6] The merger failed to close, and in April 2016 WTSN and WBYY were sold to Binnie Media for $2.1 million.

Mike Pomp was named the "Radio Personality of the Year" in 2016 by the New Hampshire Association of Broadcasters.