The comments shed some light on what exactly caused this[1]:<p>&gt; Yes, as part of our investigation we did reach out and it sounds like it was related to a route optimizer.<p>[1]: <a href="http:&#x2F;&#x2F;www.bgpmon.net&#x2F;large-hijack-affects-reachability-of-high-traffic-destinations&#x2F;comment-page-1&#x2F;#comment-462074" rel="nofollow">http:&#x2F;&#x2F;www.bgpmon.net&#x2F;large-hijack-affects-reachability-of-h...</a>