yubikey.dk
Last scanned: 2026-06-23 20:06:22  ·  925ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers4 records   50ms
NameserverIP addressesPTRASN / ISP
ns-cloud-a1.googledomains.com 2001:4860:4802:32::6a
216.239.32.106		 ns-cloud-a1.googledomains.com
ns-cloud-a1.googledomains.com		 AS15169 Google LLC
AS15169 Google LLC
ns-cloud-a2.googledomains.com 2001:4860:4802:34::6a
216.239.34.106		 ns-cloud-a2.googledomains.com
ns-cloud-a2.googledomains.com		 AS15169 Google LLC
AS15169 Google LLC
ns-cloud-a3.googledomains.com 2001:4860:4802:36::6a
216.239.36.106		 ns-cloud-a3.googledomains.com
ns-cloud-a3.googledomains.com		 AS15169 Google LLC
AS15169 Google LLC
ns-cloud-a4.googledomains.com 2001:4860:4802:38::6a
216.239.38.106		 ns-cloud-a4.googledomains.com
ns-cloud-a4.googledomains.com		 AS15169 Google LLC
AS15169 Google LLC
🌍 A Records1 records   50ms
IPTTLPTRASNISP / OrgCIDRCountryCity
35.190.17.235 10800s 235.17.190.35.bc.googleusercontent.com AS396982 Google LLC 35.184.0.0/13 🇺🇸 United States —
📧 MX Records1 records   79ms
PriorityTTLMail ServerIP addressesPTRASN
0 10800s .  Null MX — domain accepts no email (RFC 7505)
🔷 AAAA Records (IPv6)1 records   49ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2600:1901:0:e733:: 10800s — AS396982 Google LLC 2600:1900:0:0:0:0:0:0/31 🇺🇸 United States Kansas City
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records1 records   351ms
TXT Record
v=spf1 -all
✉️ SPF
PolicyRecord (yubikey.dk)
-all (hard fail) v=spf1 -all
📨 DMARC
PolicyRecord (_dmarc.yubikey.dk)
p=reject v=DMARC1; p=reject; rua=mailto:dmarc-rua@yubico.com
📬 MTA-STS
✗ No MTA-STS policy — SMTP TLS not enforced
📈 TLSRPT
✗ No TLSRPT record — no SMTP TLS failure reporting
📜 CAA Records3 records   60ms
FlagsTagValue
0 iodef mailto:tlsadmin@yubico.com
0 issue letsencrypt.org
0 issue pki.goog
🔏 ACME Challenge
TypeNameValue
CNAME _acme-challenge.yubikey.dk c5f68905-5bfa-4efa-ba46-0c1d8f042eb8.13.authorize.certificatemanager.goog
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC134ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer
🏷️ SOA67ms
FieldValue
Serial1
Primary NS (MNAME)ns-cloud-a1.googledomains.com
Responsible (RNAME)cloud-dns-hostmaster@google.com
Refresh21600s
Retry3600s
Expire259200s
Minimum (neg-cache TTL)300s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
50ms
A
50ms
MX
79ms
AAAA
49ms
TXT
351ms
CAA
60ms
HTTPS
94ms
TLSA
73ms
SOA
67ms
MTA-STS
88ms
DNSSEC
134ms
SRV
100ms
Total
925ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-06-23 20:06:22 925ms 4 NS 1 A 1 MX 🔓 Insecure View
2026-06-22 17:46:12 1568ms 4 NS 1 A 1 MX 🔓 Insecure View
2026-06-21 15:33:37 955ms 0 NS 0 A 0 MX ❓ Unknown View
2026-06-18 00:27:29 1101ms 4 NS 1 A 0 MX 🔓 Insecure View
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