Google's OpenDNS servers are not down, they are recursive resolvers, and are not getting data from Dyn's authoritative resolvers. OpenDNS caches DNS data for l

Google's OpenDNS servers are not down, they are recursive resolvers, and are not getting data from Dyn's authoritative resolvers. OpenDNS caches DNS data for longer than other recursive DNS providers (they call it smartcache, IIRC), which is why they are still working.