tresu-investment-holding.dk

Records from scan: 2026-10-22 22:51:27 · 851ms total · last checked 2026-10-25 16:02 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

tresu-investment-holding.dk is a .dk domain served by 4 nameservers (a.ns14.net, b.ns14.net, c.ns14.net and 1 more). It was registered on 8 June 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by .. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

4 records 47ms

Nameserver	IP addresses	PTR	ASN / ISP
a.ns14.net	2001:8d8:fe:53:217:160:80:160 217.160.80.160	ns-ix1.ui-dns.de ns-ix1.ui-dns.de	AS8560 IONOS SE AS8560 IONOS SE
b.ns14.net	2001:8d8:fe:53:217:160:81:160 217.160.81.160	ns-ix1.ui-dns.biz ns-ix1.ui-dns.biz	AS8560 IONOS SE AS8560 IONOS SE
c.ns14.net	185.132.35.160 2607:f1c0:fe:53:185:132:35:160	ns-ix1.ui-dns.org ns-ix1.ui-dns.org	AS15418 Fasthosts Internet Limited AS15418 Fasthosts Internet Limited
d.ns14.net	185.132.34.160 2607:f1c0:fe:53:185:132:34:160	ns-ix1.ui-dns.com ns-ix1.ui-dns.com	AS15418 Fasthosts Internet Limited AS15418 Fasthosts Internet Limited

🌍 A Records#

🌍

No A records found

📧 MX Records#

1 records 43ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	. Null MX — domain accepts no email (RFC 7505)

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 257ms

TXT Record
v=spf1 -all

✉️ SPF#

Policy	Record (tresu-investment-holding.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC#

Policy	Record (_dmarc.tresu-investment-holding.dk)
p=reject	v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s;fo=1;rua=mailto:dmarc_agg@vali.email

📬 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#

checked 2026-10-22 22:51:27

www	NXDOMAIN
www vs bare domain	Neither resolves tresu-investment-holding.dk: no address www.tresu-investment-holding.dk: no address
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

112ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

41ms

Field	Value
Serial	2022061400
Primary NS (MNAME)	a.ns14.net
Responsible (RNAME)	do-not-reply@tresu-investment-holding.dk
Refresh	43200s
Retry	7200s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-19 23:27:40

Field	Value
Registrar	InterNetX GmbH
Registered	2022-06-08
Expires	2027-06-07 (224d)

🔗 Same registrant#

1 domain

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
tresu.dk	InterNetX GmbH

📋 WHOIS#

⏱️ Lookup Timing#

47ms

45ms

43ms

AAAA

39ms

TXT

257ms

CAA

38ms

HTTPS

47ms

TLSA

62ms

SOA

41ms

MTA-STS

75ms

DNSSEC

112ms

SRV

77ms

Total

851ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-22 22:51:27 shown	851ms	4 NS 0 A 1 MX	🔓 Insecure
2026-09-29 19:20:56	608ms	4 NS 0 A 1 MX	🔓 Insecure
2026-06-27 03:07:02	749ms	4 NS 0 A 1 MX	🔓 Insecure
2026-06-23 10:33:23	917ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 23:06:02	960ms	4 NS 0 A 0 MX	🔓 Insecure