IPv6 Deployment Status: latest error msg for vk.com

Error(s) found during latest scan: NS=ns3.vk.com=2a00:bdc0:ff:3::2 does not respond, NS=ns2.vk.com=2a00:bdc0:ff:2::2 does not respond, NS=ns1.vk.com=2a00:bdc0:ff:1