ip6.arpa zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (196.216.169.11)
ip6.arpa/DNSKEY: No response was received from the server over TCP (tried 9 times). See RFC 1035, Sec. 4.2. (196.216.169.11, TCP_-_EDNS0_4096_D)
ip6.arpa/DNSKEY: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (196.216.169.11, UDP_-_EDNS0_512_D_KN)
ip6.arpa/SOA: No response was received from the server over TCP (tried 3 times). See RFC 1035, Sec. 4.2. (196.216.169.11, TCP_-_EDNS0_4096_D_N)
ip6.arpa/TXT has errors; select the "Denial of existence" DNSSEC option to see them.
ip6.arpa/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (4)
./DNSKEY (alg 8, id 11019): No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (199.7.83.42, UDP_-_EDNS0_4096_D_KN)
./DNSKEY (alg 8, id 20326): No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (199.7.83.42, UDP_-_EDNS0_4096_D_KN)
./DNSKEY (alg 8, id 60955): No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (199.7.83.42, UDP_-_EDNS0_4096_D_KN)
ip6.arpa/SOA: No response was received from the server over UDP (tried 7 times) until the NSID EDNS option was removed (however, this server appeared to respond legitimately to other queries with the NSID EDNS option present). See RFC 6891, Sec. 6.1.2. (196.216.169.11, UDP_-_EDNS0_4096_D_KN_0x20)