ip6.arpa zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2620:37:e000::53)
ip6.arpa/DNSKEY: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (2001:43f8:110::11, UDP_-_EDNS0_512_D_KN)
ip6.arpa/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2620:37:e000::53, UDP_-_NOEDNS_)
ip6.arpa/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
ip6.arpa/MX has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (4)
ip6.arpa/NS: 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. (2001:43f8:110::11, UDP_-_EDNS0_4096_D_KN)
ip6.arpa/SOA: 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. (2001:43f8:110::11, UDP_-_EDNS0_4096_D_KN)
ip6.arpa/NSEC3PARAM has warnings; select the "Denial of existence" DNSSEC option to see them.
ip6.arpa/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.