in-addr.arpa zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (199.180.182.53)
in-addr.arpa/DNSKEY: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (199.180.182.53, UDP_-_EDNS0_4096_D_KN)
in-addr.arpa/SOA: No response was received from the server over TCP (tried 3 times). See RFC 1035, Sec. 4.2. (199.180.182.53, TCP_-_EDNS0_4096_D_N)
in-addr.arpa/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (2)
arpa/DS (alg 8, id 42581): 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. (192.112.36.4, UDP_-_EDNS0_4096_D_KN)
arpa/DS (alg 8, id 42581): 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. (192.112.36.4, UDP_-_EDNS0_4096_D_KN)