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DNSViz: A DNS visualization tool

facebook.com

DNSSEC options (hide)
  1. |?|
  2. |?|
  3. |?|
  4. |?|
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Notices
DNSSEC Authentication Chain

RRset statusRRset status

Secure (2)
  • com/SOA
  • com/SOA

DNSKEY/DS/NSEC statusDNSKEY/DS/NSEC status

Secure (7)
  • ./DNSKEY (alg 8, id 14748)
  • ./DNSKEY (alg 8, id 20326)
  • ./DNSKEY (alg 8, id 26838)
  • NSEC3 proving non-existence of facebook.com/DS
  • com/DNSKEY (alg 8, id 30909)
  • com/DNSKEY (alg 8, id 39343)
  • com/DS (alg 8, id 30909)

Delegation statusDelegation status

Lame (1)
  • com to facebook.com
Secure (1)
  • . to com

NoticesNotices

Errors (4)
  • facebook.com zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (129.134.30.12, 129.134.31.12, 185.89.218.12, 185.89.219.12, 2a03:2880:f0fc:c:face:b00c:0:35, 2a03:2880:f0fd:c:face:b00c:0:35, 2a03:2880:f1fc:c:face:b00c:0:35, 2a03:2880:f1fd:c:face:b00c:0:35)
  • facebook.com zone: There was an error resolving the following NS name(s) to address(es): a.ns.facebook.com, b.ns.facebook.com, c.ns.facebook.com, d.ns.facebook.com
  • facebook.com/A: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (129.134.30.12, 129.134.31.12, 185.89.218.12, 185.89.219.12, 2a03:2880:f0fc:c:face:b00c:0:35, 2a03:2880:f0fd:c:face:b00c:0:35, 2a03:2880:f1fc:c:face:b00c:0:35, 2a03:2880:f1fd:c:face:b00c:0:35, UDP_-_NOEDNS_)
  • facebook.com/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (129.134.30.12, 129.134.31.12, 185.89.218.12, 185.89.219.12, 2a03:2880:f0fc:c:face:b00c:0:35, 2a03:2880:f0fd:c:face:b00c:0:35, 2a03:2880:f1fc:c:face:b00c:0:35, 2a03:2880:f1fd:c:face:b00c:0:35, UDP_-_NOEDNS_)
Warnings (2)
  • com/DS (alg 8, id 30909): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (193.0.14.129, UDP_-_EDNS0_4096_D_KN)
  • com/DS (alg 8, id 30909): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (193.0.14.129, UDP_-_EDNS0_4096_D_KN)

DNSKEY legend

Full legend
SEP bit setSEP bit set
Revoke bit setRevoke bit set
Trust anchorTrust anchor
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DNSSEC authentication graph