51dn.dk
Last scanned: 2026-08-25 22:24:40  ·  9684ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   60ms
NameserverIP addressesPTRASN / ISP
ns1.siteground.net 75.2.77.104 ac4b097dbd0dd6307.awsglobalaccelerator.com AS16509 Amazon.com, Inc.
ns2.siteground.net 99.83.229.113 ac4b097dbd0dd6307.awsglobalaccelerator.com AS16509 Amazon.com, Inc.
🌍 A Records1 records   53ms
IPTTLPTRASNISP / OrgCIDRCountryCity
35.214.140.204 86400s 204.140.214.35.bc.googleusercontent.com AS43515 Google Ireland Limited 35.214.128.0/17 🇳🇱 The Netherlands Groningen
📧 MX Records3 records   53ms
PriorityTTLMail ServerIP addressesPTRASN
10 86400s mx10.antispam.mailspamprotection.com 34.149.79.66 66.79.149.34.bc.googleusercontent.com AS396982 Google LLC
20 86400s mx20.antispam.mailspamprotection.com 34.120.156.61 61.156.120.34.bc.googleusercontent.com AS396982 Google LLC
30 86400s mx30.antispam.mailspamprotection.com 34.111.121.216 216.121.111.34.bc.googleusercontent.com AS396982 Google LLC
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscover35.214.140.204
🔶 Autoconfig35.214.140.204
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records1 records   316ms
TXT Record
v=spf1 +a +mx include:51dn.dk.spf.auto.dnssmarthost.net ~all
✉️ SPF
PolicyRecord (51dn.dk)
~all (soft fail) v=spf1 +a +mx include:51dn.dk.spf.auto.dnssmarthost.net ~all
📨 DMARC
PolicyRecord (_dmarc.51dn.dk)
p=none (monitor only) v=DMARC1; p=none; aspf=r; adkim=r;
📬 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
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC9089ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer
🏷️ SOA0ms
FieldValue
Serial36
Primary NS (MNAME)ns1.siteground.net
Responsible (RNAME)admins@siteground.com
Refresh10800s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)3600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
60ms
A
53ms
MX
53ms
AAAA
55ms
TXT
316ms
CAA
56ms
HTTPS
48ms
TLSA
107ms
SOA
0ms
MTA-STS
110ms
DNSSEC
9089ms
SRV
92ms
Total
9684ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-25 22:24:40 9684ms 2 NS 1 A 3 MX 🔓 Insecure View
2026-08-16 19:21:48 1794ms 2 NS 1 A 3 MX 🔓 Insecure View
2026-07-29 04:27:25 1059ms 2 NS 1 A 3 MX 🔓 Insecure View
2026-07-27 13:50:14 13750ms 2 NS 0 A 0 MX 🔓 Insecure View
2026-07-15 17:43:11 935ms 2 NS 1 A 3 MX 🔓 Insecure View
2026-07-02 11:03:13 4137ms 2 NS 1 A 3 MX 🔓 Insecure View
2026-06-21 00:43:08 574ms 2 NS 1 A 3 MX 🔓 Insecure View
2026-06-16 13:14:13 696ms 2 NS 1 A 3 MX 🔓 Insecure View
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