com zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2001:502:1ca1::30, 2001:503:d414::30, 2001:503:eea3::30)
ubuntu.com/DS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2001:500:d937::30, 2001:501:b1f9::30, UDP_-_NOEDNS_)