I have to agree, 680 news is the best.
So good that all other Rogers owned AM stations that are even close to a news format can borrow content from 680 when necessary, to avoid paying extra staff to run those stations.
You'll notice one good example to be News 1310, which borrows Peter Gross from 680 to do sports in the morning.
(News 1310 Ottawa and News 570 Kitchener are not counted on the list of all news stations because they only run the news wheel for morning and afternoon drive. It's talk shows the rest of the time.)
American here!
I thought these were national radio networks (based on the AM frequency in Toronto) at first, then realized that they are local all-news AM stations.
Nothing out-of-the-ordinary as 3 are Rogers stations in the Big 3 Anglo markets. CBS Radio (later acquired by Entercom in late 2017; recently rebranded Audacy) was the equivalent of Rogers in the U.S. but with more all-news stations in a handful of major cities.
They still have the monopoly on the pure all-news format (not to be confused with the similar News-Talk format iHeart prefers like here in Houston; since Ottawa and Kitchener were brought up) and are still affiliated with CBS News Radio after the separation for network top-of-the-hour reports and national breaking news/special event coverage.