The station signed on June 10, 2006 as WUMD, owned by the University of Massachusetts Dartmouth. WUMD served as a replacement for WSMU-FM, which began with 10 watts of power on 91.1 MHz as WUSM in September 1973. Its first studio was in the cafeteria basement. In the fall of 1974, WUSM moved its studio to the campus center and increased power. It remained a student-programmed station throughout the next three decades. The call letters changed to WSMU-FM in 1989. In June 2006, UMass Dartmouth sold the 91.1 frequency to the Educational Media Foundation, which relaunched it as WTKL; the programming that had been on WSMU-FM then moved to the new WUMD on 89.3.
Sale to Rhode Island Public Radio/The Public's Radio
On January 4, 2017, it was announced that UMass Dartmouth was selling WUMD to Rhode Island Public Radio for $1.5 million & $617,100 worth of underwriting for 10 years. RIPR intended to move WUMD to Tiverton, Rhode Island to simulcast its programming. The FCC approved the transfer of the station license on May 1, 2017. WUMD signed off for the final time at noon on June 26, 2017 following the consummation of the purchase. Rhode Island Public Radio began broadcasting its NPR news/talk format on July 12, 2017 and the callsign changed to WXNI. An FCC construction permit was sought and obtained to move 89.3 to the former tower of local ABC affiliate WLNE-TV in Tiverton, Rhode Island, greatly increasing the area covered by the signal. The designated community of license was also to change from North Dartmouth, Massachusetts to Newport, Rhode Island. On July 29, 2018, in preparation for the final move to Tiverton, the callsign was changed to WNPN. The FCC approval of the move to Newport was granted effective August 13, 2018. On paper, WNPN, like its predecessors, operated at relatively modest power for a full NPR member on the FM band. However, it now broadcast from the tallest active FM tower in Rhode Island, at 833 feet. This added over 700,000 people in Rhode Island and the South Coast to its coverage area. As a result, it now provided at least secondary coverage to almost all of Rhode Island, and also brought a city-grade NPR signal to New Bedford and most of the South Coast for the first time ever. Reflecting this increased coverage, two months after signing on WNPN from its new site, Rhode Island Public Radio rebranded itself as "The Public's Radio."