Fri Feb 10 4:45 AM PST: One of our upstream carriers (Cogent) has begun experiencing intermittent routing issues. We have turned down the BGP peering session with them and all traffic is flowing through our other carriers at the moment. Currently Cogent is aware of the issue (they have labeled it as a "Mass Outage" on their network). Once we've been notified of a resolution to the problem we will bring Cogent back online and resume normal routing with them in the network mix.