“AS396531 "Allegheny Technologies Incorporated" is leaking a better-reachable route for AS13335 "Cloudflare, Inc." towards AS701 "Verizon Business/UUnet" explaining the current LSE going on.”
That appears to be a steel/alloys company. Why are they operating BGP equipment?
It seems silly to me that an end user company not providing any network services which only has a 256 IP block has the ability to break a significant portion of the internet with a configuration mistake. There are several ways to setup dual ISPs and routing that don't involve such risk.
thisissue still exists if you break up your IP space, it just makes it far harder to manage.
It doesn't surprise me at all that they are still a part of infrastructure, somehow.
Update: sorry, I may have been wrong. Hard to see clearly in the fog of BGP.