clinicaltrials.gov zone: The server(s) were not responsive to queries over TCP. (130.14.252.50, 130.14.252.53, 165.112.6.3, 2607:f220:41f:1405::3)
clinicaltrials.gov/AAAA: No response was received from the server over UDP (tried 12 times). (2607:f220:41e:252::53, UDP_-_NOEDNS_)
clinicaltrials.gov/DNSKEY: No response was received from the server over TCP (tried 12 times). (130.14.252.50, TCP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/MX (NODATA): No NSEC RR(s) were returned to validate the NODATA response. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/MX (NODATA): No SOA RR was returned with the NODATA response. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/MX (NODATA): The Authoritative Answer (AA) flag was not set in the response. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/MX: DNSSEC was effectively downgraded because no response was received from the server over UDP (tried 11 times) with EDNS enabled. (2607:f220:41e:252::50, UDP_-_NOEDNS_)
clinicaltrials.gov/MX: No response was received from the server over UDP (tried 11 times) until EDNS was disabled (however, this server appeared to respond legitimately to other queries with EDNS enabled). (2607:f220:41e:252::50, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/MX: No response was received from the server over UDP (tried 12 times). (2607:f220:41f:1405::3, UDP_-_NOEDNS_)
clinicaltrials.gov/MX: The DNSSEC records necessary to validate the response could not be retrieved from the server. (2607:f220:41e:252::50, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/NS: The Authoritative Answer (AA) flag was not set in the response. (165.112.6.3, 2607:f220:41f:1405::3, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/SOA (NODATA): No NSEC RR(s) were returned to validate the NODATA response. (165.112.6.3, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
clinicaltrials.gov/SOA (NODATA): No SOA RR was returned with the NODATA response. (165.112.6.3, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
clinicaltrials.gov/SOA (NODATA): The Authoritative Answer (AA) flag was not set in the response. (165.112.6.3, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
clinicaltrials.gov/SOA: No response was received from the server over TCP (tried 3 times). (130.14.252.50, 130.14.252.53, 165.112.6.3, 2607:f220:41f:1405::3, TCP_-_EDNS0_4096_D_N)
clinicaltrials.gov/SOA: No response was received from the server over TCP (tried 7 times). (2607:f220:41f:1405::3, TCP_-_EDNS0_4096_D_KN_0x20)
clinicaltrials.gov/SOA: No response was received from the server over UDP (tried 12 times). (2607:f220:41e:252::50, 2607:f220:41f:1405::3, UDP_-_NOEDNS_)
clinicaltrials.gov/TXT (NODATA): No NSEC RR(s) were returned to validate the NODATA response. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/TXT (NODATA): No SOA RR was returned with the NODATA response. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/TXT (NODATA): The Authoritative Answer (AA) flag was not set in the response. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/TXT: No response was received from the server over UDP (tried 12 times). (2607:f220:41f:1405::3, UDP_-_NOEDNS_)
Warnings (4)
clinicaltrials.gov/MX: The Authoritative Answer (AA) flag was not set in the response. (165.112.6.3, 2607:f220:41f:1405::3, UDP_-_EDNS0_512_D_KN)
clinicaltrials.gov/NS: No response was received from the server over UDP (tried 6 times) until the COOKIE EDNS option was removed (however, this server appeared to respond legitimately to other queries with the COOKIE EDNS option present). (130.14.252.53, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/NSEC3PARAM: 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. (130.14.252.53, UDP_-_EDNS0_4096_D_KN)
clinicaltrials.gov/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. (2607:f220:41e:252::50, 2607:f220:41e:252::53, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)