Per the title. My internet is functioning, speed test gives good results, but certain websites just won't open (bbc websites, Wikipedia, Microsoft 365) . They load indefinitely. I have tried this on multiple devices with the same effect. The problem is fixed temporarily by unplugging my router and leaving it for about ten minutes before plugging back in. Using the rest button does not help. The problem comes back after about half an hour or so.
other websites are perfectly usable. YouTube and Google for example. Just the same few each time, on all devices.
any advice would be greatly appreciated.
