gov to irs.gov: No valid RRSIGs made by a key corresponding to a DS RR were found covering the DNSKEY RRset, resulting in no secure entry point (SEP) into the zone. See RFC 4035, Sec. 2.2, RFC 6840, Sec. 5.11.
irs.gov zone: The server(s) responded over TCP with a malformed response or with an invalid RCODE. See RFC 1035, Sec. 4.1.1. (152.216.11.133, 152.216.13.164, 2610:30:0:13::164, 2610:30:2000:53::91)
irs.gov zone: The server(s) responded over UDP with a malformed response or with an invalid RCODE. See RFC 1035, Sec. 4.1.1. (152.216.11.133, 152.216.13.164, 2610:30:0:13::164, 2610:30:2000:53::91)
irs.gov zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (152.216.13.165, 2610:30:0:13::165)
irs.gov zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (152.216.7.164, 152.216.7.165, 152.216.11.132, 2610:30:2000:53::90, 2610:30:4000:53::90, 2610:30:4000:53::91)
irs.gov/A: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (152.216.7.164, 152.216.7.165, 152.216.11.132, 2610:30:2000:53::90, 2610:30:2000:53::91, 2610:30:4000:53::90, 2610:30:4000:53::91, UDP_-_NOEDNS_)
irs.gov/A: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (152.216.11.133, 152.216.13.164, 2610:30:0:13::164, UDP_-_NOEDNS_)
irs.gov/AAAA: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (152.216.11.133, 152.216.13.164, 2610:30:0:13::164, 2610:30:2000:53::91, UDP_-_NOEDNS_)
irs.gov/DNSKEY: No response was received from the server over TCP (tried 12 times). See RFC 1035, Sec. 4.2. (152.216.13.165, TCP_-_EDNS0_4096_D_KN)
irs.gov/DNSKEY: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2610:30:0:13::165, UDP_-_EDNS0_4096_D_KN)
irs.gov/DNSKEY: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (2610:30:2000:53::91, UDP_-_EDNS0_512_D_KN)
irs.gov/DNSKEY: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (152.216.11.133, 152.216.13.164, 2610:30:0:13::164, 2610:30:2000:53::91, UDP_-_EDNS0_512_D_KN, UDP_-_NOEDNS_)
irs.gov/MX: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (2610:30:2000:53::91, UDP_-_EDNS0_512_D_KN)
irs.gov/MX: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (152.216.11.133, 152.216.13.164, 2610:30:0:13::164, 2610:30:2000:53::91, UDP_-_EDNS0_512_D_KN, UDP_-_NOEDNS_)
irs.gov/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (152.216.7.164, 152.216.7.165, 152.216.11.132, 152.216.13.165, 2610:30:2000:53::90, 2610:30:4000:53::90, 2610:30:4000:53::91, UDP_-_NOEDNS_)
irs.gov/NS: No response was received from the server over UDP (tried 13 times). See RFC 1035, Sec. 4.2. (152.216.11.133, UDP_-_NOEDNS_)
irs.gov/NS: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (152.216.13.164, 2610:30:0:13::164, 2610:30:2000:53::91, UDP_-_NOEDNS_)
irs.gov/NSEC3PARAM: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (152.216.11.133, UDP_-_NOEDNS_)
irs.gov/NSEC3PARAM: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (152.216.13.164, 2610:30:0:13::164, 2610:30:2000:53::91, UDP_-_NOEDNS_)
irs.gov/SOA: No response was received from the server over TCP (tried 3 times). See RFC 1035, Sec. 4.2. (152.216.13.165, 2610:30:0:13::165, TCP_-_EDNS0_4096_D_N)
irs.gov/SOA: No response was received from the server over TCP (tried 4 times). See RFC 1035, Sec. 4.2. (152.216.13.164, TCP_-_NOEDNS_)
irs.gov/SOA: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2610:30:2000:53::91, UDP_-_NOEDNS_)
irs.gov/SOA: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (152.216.11.133, 152.216.13.164, 2610:30:0:13::164, 2610:30:2000:53::91, UDP_-_NOEDNS_, UDP_-_NOEDNS__0x20)
irs.gov/SOA: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (152.216.11.133, 2610:30:0:13::164, 2610:30:2000:53::91, TCP_-_NOEDNS_)
irs.gov/TXT: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (152.216.11.133, UDP_-_NOEDNS_)
irs.gov/TXT: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (152.216.13.164, 2610:30:0:13::164, 2610:30:2000:53::91, UDP_-_NOEDNS_)
vfrsnimxh1.irs.gov/A has errors; select the "Denial of existence" DNSSEC option to see them.
irs.gov/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
irs.gov/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (5)
gov to irs.gov: AAAA glue records exist for ns1.irs.gov, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
gov to irs.gov: AAAA glue records exist for ns5.irs.gov, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
irs.gov/NSEC3PARAM: 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. (152.216.13.165, UDP_-_EDNS0_4096_D_KN)
irs.gov/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. (2610:30:0:13::165, UDP_-_EDNS0_4096_D_KN)
irs.gov/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.