Comment by eqvinox

For a length-15 ASpath to show up on the internet, a whole bunch of better routes need to disappear first, which seems to have happened here. But that disappearance is very likely unrelated to CANTV.

Furthermore, BGP routes can get "stuck", if some device doesn't handle a withdrawal correctly… this can lead to odd routes like the ones seen here. Especially combined with the long path length and disappearance of better routes.