51dn.dk

📜 Historical scan 2026-06-16 13:14:13 · ← 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 53ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.siteground.net	—	—	—
ns2.siteground.net	—	—	—

🌍 A Records#

1 records 54ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
35.214.140.204	—	204.140.214.35.bc.googleusercontent.com	AS43515	Google Ireland Limited	35.214.128.0/17	🇳🇱 The Netherlands	—

📧 MX Records#

3 records 57ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx10.antispam.mailspamprotection.com	34.149.79.66	66.79.149.34.bc.googleusercontent.com	AS396982 Google LLC
20	—	mx20.antispam.mailspamprotection.com	34.120.156.61	61.156.120.34.bc.googleusercontent.com	AS396982 Google LLC
30	—	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 170ms

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#

155ms

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

🏷️ SOA#

58ms

Field	Value
Serial	32
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#

53ms

54ms

57ms

AAAA

55ms

TXT

170ms

CAA

56ms

HTTPS

59ms

TLSA

72ms

SOA

58ms

MTA-STS

81ms

DNSSEC

155ms

SRV

0ms

Total

696ms

🕐 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	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 shown	696ms	2 NS 1 A 3 MX	🔓 Insecure