columbia.edu zone: The server(s) were not responsive to queries over UDP. (2001:550:1:a::d, 2001:550:1:b::d, 2001:978:1:a::d, 2001:978:1:b::d)
columbia.edu/A: No response was received from the server over UDP (tried 12 times). (2001:550:1:a::d, 2001:550:1:b::d, 2001:978:1:a::d, 2001:978:1:b::d, UDP_-_NOEDNS_)
columbia.edu/NS: No response was received from the server over UDP (tried 12 times). (2001:550:1:a::d, 2001:550:1:b::d, 2001:978:1:a::d, 2001:978:1:b::d, UDP_-_NOEDNS_)