4tun.dk

📜 Historical scan 2026-06-16 13:14:38 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

4tun.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was registered on 13 November 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 212.237.249.17 is hosted by team.blue Denmark A/S (AS48854) in Denmark. 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 42ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.dandomain.dk	—	—	—
ns2.dandomain.dk	—	—	—

🌍 A Records#

1 records 43ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
212.237.249.17	—	splash.dandomain.dk	AS48854	team.blue Denmark A/S	212.237.248.0/23	🇩🇰 Denmark	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-09 01:23:49

www	212.237.249.17 (AS48854) (address records, no CNAME)
www vs bare domain	Same network 4tun.dk: 212.237.249.17 (AS48854) www.4tun.dk: 212.237.249.17 (AS48854)
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

🔗 TLSA / DANE#

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

🔐 DNSSEC#

152ms

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

🏷️ SOA#

50ms

Field	Value
Serial	2020111202
Primary NS (MNAME)	ns.dandomain.dk
Responsible (RNAME)	hostmaster@dandomain.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-17 11:08:07

Field	Value
Registrar	DANDOMAIN A/S
Registered	2020-11-13
Expires	2026-11-30 (43d)

🔗 Same registrant#

15 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
gillelejesvømmeklub.dk	DANDOMAIN A/S
gribskovidræt.dk	DANDOMAIN A/S
privatsvømning.dk	DANDOMAIN A/S
r43.dk	Simply.com A/S
rentech.dk	DANDOMAIN A/S
robotven.dk	DANDOMAIN A/S
råhygge.dk	DANDOMAIN A/S
smidstrupsvøm.dk	DANDOMAIN A/S
stjernecafeen.dk	DANDOMAIN A/S
strandsvom.dk	DANDOMAIN A/S
swimcamp.dk	DANDOMAIN A/S
swimspeed.dk	DANDOMAIN A/S
tisvildesvøm.dk	DANDOMAIN A/S
vandigribskov.dk	DANDOMAIN A/S
vandpåland.dk	DANDOMAIN A/S

📋 WHOIS#

⏱️ Lookup Timing#

42ms

43ms

36ms

AAAA

41ms

TXT

204ms

CAA

48ms

HTTPS

44ms

TLSA

61ms

SOA

50ms

MTA-STS

48ms

DNSSEC

152ms

SRV

0ms

Total

478ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-24 21:37:40	437ms	2 NS 1 A 0 MX	🔒 Secure
2026-08-27 07:54:54	425ms	2 NS 1 A 0 MX	🔒 Secure
2026-08-17 14:31:05	16800ms	2 NS 1 A 0 MX	🔒 Secure
2026-06-26 18:53:40	435ms	2 NS 1 A 0 MX	🔒 Secure
2026-06-23 17:00:13	1172ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 13:14:38 shown	478ms	2 NS 1 A 0 MX	🔒 Secure