51dn.dk

📜 Historical scan 2026-08-16 19:21:48 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

51dn.dk is a .dk domain served by 2 nameservers (ns1.siteground.net, ns2.siteground.net). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 35.214.140.204 is hosted by Google Ireland Limited (AS43515) in The Netherlands. Mail is handled by mx10.antispam.mailspamprotection.com, mx20.antispam.mailspamprotection.com and 1 more. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 88ms

Nameserver	IP addresses	PTR	ASN / 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 Records#

1 records 30ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
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 Records#

3 records 23ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
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

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 134ms

TXT Record
v=spf1 +a +mx include:51dn.dk.spf.auto.dnssmarthost.net ~all

✉️ SPF#

Policy	Record (51dn.dk)
~all (soft fail)	v=spf1 +a +mx include:51dn.dk.spf.auto.dnssmarthost.net ~all

📨 DMARC#

Policy	Record (_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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-01 06:45:13

www	Address record (no CNAME)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	51dn.dk.default.dkim.auto.dnssmarthost.net	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 4/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

154ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

25ms

Field	Value
Serial	36
Primary NS (MNAME)	ns1.siteground.net
Responsible (RNAME)	admins@siteground.com
Refresh	10800s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

88ms

30ms

23ms

AAAA

45ms

TXT

134ms

CAA

23ms

HTTPS

36ms

TLSA

383ms

SOA

25ms

MTA-STS

46ms

DNSSEC

154ms

SRV

0ms

Total

1794ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 06:45:13	598ms	2 NS 1 A 3 MX	🔓 Insecure
2026-09-20 12:33:34	1410ms	2 NS 1 A 3 MX	🔓 Insecure
2026-08-25 22:24:40	9684ms	2 NS 1 A 3 MX	🔓 Insecure
2026-08-16 19:21:48 shown	1794ms	2 NS 1 A 3 MX	🔓 Insecure
2026-07-29 04:27:25	1059ms	2 NS 1 A 3 MX	🔓 Insecure
2026-07-27 13:50:14	13750ms	2 NS 0 A 0 MX	🔓 Insecure
2026-07-15 17:43:11	935ms	2 NS 1 A 3 MX	🔓 Insecure
2026-07-02 11:03:13	4137ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-21 00:43:08	574ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-16 13:14:13	696ms	2 NS 1 A 3 MX	🔓 Insecure