WPRB traces its origins to a campus
AM station, WPRU, that launched December 6, 1940. WPRU was founded by H. Grant Theis, a Princeton University student at the time. It often is cited as the oldest commercially licensed campus radio station in the United States. In 1955, WPRU got its FM license. It
signed on as WPRB, the first college station on the FM dial in the United States, after the WPRU
call sign was found to be already in use by a ship. It is considered a pioneer in FM stereo broadcasting, transmitting a stereo signal beginning in 1964. WPRB has broadcast on three different FM frequencies in its history: it first was heard on 103.9 MHz; in 1959, it moved to 103.5 MHz; and it moved to its current frequency of 103.3 MHz in 1962. During the 1960s and 1970s, it joined with other
Ivy League universities to form the "Ivy Network", sharing some programming and resources. It later was an
affiliate of the
ABC FM Network. In 1986,
Spin Magazine named WPRB the best commercial college station in the country. After decades of operation under an advertising-supported business model, in 2006 WPRB switched to a listener-supported model (although it remains a commercially licensed station). In 2009, WPRB went on to acquire a Princeton student magazine, the
Nassau Weekly. This partnership concluded in 2024. One of its disc jockeys,
Jon Solomon, has hosted a 24-hour+ Christmas music
radiothon every year but one since 1988. WPRB was the first commercial radio station in the United States to play
Lil Nas X's "
Old Town Road" when it debuted on John Weingart's long-running program "Music You Can't Hear on the Radio". ==Broadcast signal==