The station signed on in January 1958 as WSRO, operating out of Marlborough.[2][3]
At one time, WSRO was a music station.[3][4] Additionally, at one time, the station was simulcast in Gardner on WGAW (1340). However, in 1996, the station filed for bankruptcy, and was sold separately from WGAW in October.[5] The new ownership gradually shifted the station to more of a talk radio format the following year.[6][7]
WSRO was sold to Alex Langer in 1998.[8] In early 1999, the station let go much of its staff[9] and became a full-time relay of sister station WRPT (650);[10] soon afterward, the station lost its original transmitter location in Marlborough and relocated to a temporary site in Hudson.[11] In October 2000, WSRO applied to move to Watertown, operating from a transmitter location in Lexington.[12]
The station was sold to Multicultural in 2002.[13] The callsign was soon changed to WAZN, as the WSRO callsign remained with Langer on 650 AM.[14] The move to Watertown was completed by Multicultural in early 2004.[15] The station began broadcasting Chinese programming on February 1, 2016, and later moved to Spanish Christan format on March 27, 2020.[16]
