I'd be extremely cautious with straight up blocking at AS level, especially with a plain list like this. I ran it through our AS database and it seems to be ex

I'd be extremely cautious with straight up blocking at AS level, especially with a plain list like this. I ran it through our AS database and it seems to be extremely hit or miss. Some check out and fall well within the top 5% of most reported AS while others (for instance AS43097) we have simply never seen at all which makes it unlikely to be so malicious that it should be blocked on sight.