What seems to have happened is that Centurylinks internal routing has collapsed in some way. But they're still announcing all routes and they don't stop announc

What seems to have happened is that Centurylinks internal routing has collapsed in some way. But they're still announcing all routes and they don't stop announcing routes when other ISPs tag their routes not to be exported by Centurylink. So as other providers shut down their links to Centurylink to save themselves the outgoing packets towards centurylink travel to some part of the world where links are not shut down yet.