book-nu.dk
Last scanned: 2026-08-26 14:08:26  ·  2992ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers3 records   92ms
NameserverIP addressesPTRASN / ISP
helium.ns.hetzner.de 193.47.99.5
2001:67c:192c::add:5		 helium.ns.hetzner.de
helium.ns.hetzner.de		 AS12337 noris network AG
AS12337 noris network AG
hydrogen.ns.hetzner.com 213.133.100.98
2a01:4f8:0:1::add:1098		 hydrogen.ns.hetzner.com
hydrogen.ns.hetzner.com		 AS24940 Hetzner Online GmbH
AS24940 Hetzner Online GmbH
oxygen.ns.hetzner.com 2a01:4f8:0:1::add:2992
88.198.229.192		 oxygen.ns.hetzner.com
oxygen.ns.hetzner.com		 AS24940 Hetzner Online GmbH
AS24940 Hetzner Online GmbH
🌍 A Records1 records   55ms
IPTTLPTRASNISP / OrgCIDRCountryCity
185.150.199.163 86400s 185-150-199-163.justlinux.dk AS202914 Adeo Datacenter ApS 185.150.196.0/22 🇩🇰 Denmark Albertslund
📧 MX Records1 records   86ms
PriorityTTLMail ServerIP addressesPTRASN
10 86400s mail.book-nu.dk.book-nu.dk 185.150.199.163 185-150-199-163.justlinux.dk AS202914 Adeo Datacenter ApS
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscoverbook-nu.dk → 185.150.199.163
🔶 Autoconfigbook-nu.dk → 185.150.199.163
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records
📝
No TXT records found
✉️ SPF
✗ No SPF record — mail spoofing not restricted
📨 DMARC
✗ No DMARC record — mail spoofing not restricted
📬 MTA-STS
✗ No MTA-STS policy — SMTP TLS not enforced
📈 TLSRPT
✗ No TLSRPT record — no SMTP TLS failure reporting
📜 CAA Records
✗ No CAA records — any CA may issue certificates
🔏 ACME Challenge
TypeNameValue
CNAME _acme-challenge.book-nu.dk book-nu.dk
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC91ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer
🏷️ SOA0ms
FieldValue
Serial2026041600
Primary NS (MNAME)hydrogen.ns.hetzner.com
Responsible (RNAME)dns@hetzner.com
Refresh86400s
Retry10800s
Expire3600000s
Minimum (neg-cache TTL)3600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
92ms
A
55ms
MX
86ms
AAAA
58ms
TXT
236ms
CAA
84ms
HTTPS
49ms
TLSA
132ms
SOA
0ms
MTA-STS
79ms
DNSSEC
91ms
SRV
2041ms
Total
2992ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-26 14:08:26 2992ms 3 NS 1 A 1 MX 🔓 Insecure View
2026-06-24 05:38:53 3420ms 3 NS 1 A 1 MX 🔓 Insecure View
2026-06-22 01:30:55 1099ms 0 NS 0 A 0 MX ❓ Unknown View
2026-06-16 15:55:54 2682ms 3 NS 1 A 1 MX 🔓 Insecure View
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