On March 10, 1958, WNBP signed on the air as a daytime only station at 1470 AM, owned by Puritan Broadcasting of Lynn, Massachusetts. Puritan also owned WLYN and WLYN-FM, as well as stations in Brattleboro, Vermont, and Nashua, New Hampshire. In 1982 the station moved to 1450 kHz, added nighttime operation and changed call letters to WCEA. In 1987 the call letters were changed to WNCG; they returned to WNBP in 1991. Through the late 1970s, '80s and '90s the station changed hands several times. In 1987 it was purchased by longtime WBZ newscaster Ted Larsen and Dan Friel for $195,000. They changed the call sign to WNCG, representing "Newburyport, The Coast and Gloucester, Your Coastal Home Companion." In 1989 they sold the station to New Hampshire broadcaster Win Damon for $425,000. He changed the call sign back to WNBP. In 1998, Damon sold the station to Radio Newburyport LLC, owned by Robert "Doc" Fuller for $225,000. Fuller, along with partner J.J. Jeffrey, owned several other stations under their company name Fuller-Jeffrey Broadcasting. WNBP was a sole venture of Fuller with his longtime friend Al Mozier as General Manager. Although J.J. Jeffrey was not part of the ownership, his voice was used for all the recorded imaging and promotional announcements. Many improvements to the station were made by Fuller and Mozier including purchasing all new studio equipment, Audisk and later Air-Traffic-Control automation, new BE-1 transmitter and installing a new tower and ground system at the transmitter site on Ferry Road in Salisbury, Massachusetts. In September 2004, Radio Newburyport LLC announced a deal had been reached to sell WNBP to Westport Communications LP for a reported sale price of $500,000. The deal was brokered by Frank Boyle of Frank Boyle and Associates. At the time of the sale, Westport Communications owned only one other station, WBOQ. WNBP's studios were relocated to nearby Beverly, Massachusetts, but the station still focused its local news and community coverage on the greater Newburyport area. In March 2009, WNBP was sold by Westport Communications to Port Broadcasting, LLC, owned by Carl Strube, Peter Falconi and Robert Couture. The station began broadcasting from new downtown Newburyport studios at 6 Federal Street on March 13. The format remained the same. On January 1, 2013, WNBP shifted their format from adult standards to oldies. Among WNBP's air staff were former WBOQ disc jockey Jacky Ankeles as well as Jeff Lawrence. On July 28, 2017, Port Broadcasting agreed to sell WNBP and W291CC to Bloomberg L.P. for $1 million; Bloomberg began operating the station under a local programming and marketing agreement on August 1. The station began to simulcast Bloomberg Radio programming with WRCA ; that station also operates a translator at 106.1 MHz, which is required to limit its signal to the northeast of Boston to protect W291CC. As a result of the sale, WNBP's staff was let go. The sale was completed on November 28, 2017.
