In 1998, after Argyle merged with Hearst Corporation's broadcasting unit (creating Hearst-Argyle Television), it swapped WNAC along with WDTN in Dayton, Ohio, to Sunrise Television in exchange for WPTZ in Plattsburgh, New York, WNNE in Hartford, Vermont, and KSBW in Salinas, California. This was due to a significant signal overlap with WCVB-TV as well as WDTN's signal overlap with WLWT (which had been acquired by Argyle II in January 1997 as a result of a swap which also involved WZZM). The former station's city-grade signal covers nearly all of the Providence market, as is the case with most of Boston's major stations. At the time, the FCC normally did not allow common ownership of two stations with overlapping signals and would not even consider granting a waiver for a city-grade overlap. Sunrise bought WPRI from Clear Channel in 2000, then sold WNAC to LIN TV in early 2001, since FCC regulations do not allow common ownership of two of the four highest-rated stations in the same market.