u-book.dk
Last scanned: 2026-08-27 17:13:43  ·  506ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers3 records   33ms
NameserverIP addressesPTRASN / ISP
ns1.e-studio.dk 195.242.131.5
2001:67c:564:fffc::11		 ns1.e-studio.dk
ns1.e-studio.dk		 AS62121 Christian Ebsen ApS
AS62121 Christian Ebsen ApS
ns2.e-studio.dk 2a00:1b18:2:3::2
62.69.152.34		 ns2.e-studio.dk
ns2.e-studio.dk		 AS47527 DLX A/S
AS47527 DLX A/S
ns3.e-studio.dk 193.200.90.183
2001:67c:564:fffc::13		 ns3.e-studio.dk
ns3.e-studio.dk		 AS62121 Christian Ebsen ApS
AS62121 Christian Ebsen ApS
🌍 A Records1 records   61ms
IPTTLPTRASNISP / OrgCIDRCountryCity
195.242.131.64 14400s web2.e-studio.dk AS62121 Christian Ebsen ApS 195.242.130.0/23 🇩🇰 Denmark —
📧 MX Records1 records   41ms
PriorityTTLMail ServerIP addressesPTRASN
0 14400s u-book.dk 195.242.131.64 web2.e-studio.dk AS62121 Christian Ebsen ApS
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscover195.242.131.64
🔶 Autoconfig195.242.131.64
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
🔌 SRV Records1 records   58ms
ServicePriorityWeightPortTarget
_autodiscover._tcp 0 0 443 cpanelemaildiscovery.cpanel.net
📝 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
TXT _acme-challenge.u-book.dk L1SMbmOUkOiWIyNqnUIetfz2zclovkzsFhQD0F7Z-10
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC94ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA0ms
FieldValue
Serial2026070601
Primary NS (MNAME)ns1.e-studio.dk
Responsible (RNAME)hostmaster@mailrelay.e-studio.dk
Refresh3600s
Retry1800s
Expire1209600s
Minimum (neg-cache TTL)86400s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
33ms
A
61ms
MX
41ms
AAAA
39ms
TXT
141ms
CAA
50ms
HTTPS
41ms
TLSA
53ms
SOA
0ms
MTA-STS
52ms
DNSSEC
94ms
SRV
58ms
Total
506ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-27 17:13:43 506ms 3 NS 1 A 1 MX 🔒 Secure View
2026-08-26 21:46:04 650ms 3 NS 1 A 1 MX 🔒 Secure View
2026-07-06 22:48:26 1537ms 3 NS 1 A 1 MX 🔒 Secure View
2026-06-17 14:33:55 1450ms 3 NS 1 A 1 MX 🔒 Secure View
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