3tn.dk

📜 Historical scan 2026-06-16 12:39:50 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

3tn.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 11 October 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 144.76.37.211 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is DNSSEC-signed and validates, has no 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 26ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	—	—	—
ns2.curanet.dk	—	—	—

🌍 A Records#

1 records 26ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
144.76.37.211	—	static.211.37.76.144.clients.your-server.de	AS24940	Hetzner Online GmbH	144.76.0.0/16	🇩🇪 Germany	—

📧 MX Records#

2 records 27ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx1.onlinemail.io	185.21.42.12	mx1.onlinemail.io	AS48854 team.blue Denmark A/S
20	—	mx2.onlinemail.io	46.36.208.16	mx2.onlinemail.io	AS48854 team.blue Denmark A/S

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 130ms

TXT Record
v=spf1 include:spf.onlinemail.io ?all

✉️ SPF#

Policy	Record (3tn.dk)
?all (neutral)	v=spf1 include:spf.onlinemail.io ?all

📨 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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 05:18:44

www	144.76.37.211 (AS24940) (address records, no CNAME)
www vs bare domain	Same network 3tn.dk: 144.76.37.211 (AS24940) www.3tn.dk: 144.76.37.211 (AS24940)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: ?all

warn "?all" is neutral: it gives receivers no guidance, much like having no SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

106ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

20ms

Field	Value
Serial	2021111801
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-07 01:40:44

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2005-10-11
Expires	2026-10-31 (14d)

📋 WHOIS#

⏱️ Lookup Timing#

26ms

27ms

AAAA

24ms

TXT

130ms

CAA

22ms

HTTPS

22ms

TLSA

394ms

SOA

20ms

MTA-STS

41ms

DNSSEC

106ms

SRV

0ms

Total

869ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 05:18:44	469ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-29 19:59:39	593ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-26 20:51:36	459ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-12 02:58:53	688ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-02 00:52:52	2085ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-02 00:25:42	636ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-16 12:39:50 shown	869ms	2 NS 1 A 2 MX	🔒 Secure