tresu.dk

📜 Historical scan 2026-08-27 22:39:56 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

tresu.dk is a .dk domain served by 4 nameservers (a.ns14.net, b.ns14.net, c.ns14.net and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.201.39.91 is hosted by Itm8 A/S (AS44398) in Denmark. Mail is handled by tresu-dk.mail.protection.outlook.com. 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#

4 records 60ms

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#

1 records 50ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.201.39.91	3600s	web01.ptr.tangora.dk	AS44398	Itm8 A/S	193.201.39.0/24	🇩🇰 Denmark	Copenhagen

📧 MX Records#

1 records 64ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	tresu-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca04::2 2a01:111:f403:ca04::9 2a01:111:f403:ca48::a 52.101.181.153 52.101.68.32 52.101.73.155 52.101.73.8	mail-dbapr03cu00100.inbound.protection.outlook.com mail-du2pr03cu00102.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-wa4pr04cu00101.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-am7pr02cu00203.inbound.protection.outlook.com mail-am0pr04cu00500.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.24

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

5 records 277ms

TXT Record
apple-domain-verification=Yz18OtV0JFadIZSg
HjSeTNi+sIGzq3to7RH6KaRzDasE+vGrx41QnnOxez1LkhGNib4RgCb2EsjBZkMUs1p4Iv+P2Ykj4efHAZ4niA==
MS=2309D3D242B5B1B47422E2C373B3A87B1A046249
MS=ms47924617
v=spf1 ip4:194.182.26.15 ip4:87.52.100.164 ip4:152.115.121.60 ip4:193.201.39.91 include:spf.protection.outlook.com include:spfrerouting.xink.io include:_spf.salesforce.com -all

✉️ SPF#

Policy	Record (tresu.dk)
-all (hard fail)	v=spf1 ip4:194.182.26.15 ip4:87.52.100.164 ip4:152.115.121.60 ip4:193.201.39.91 include:spf.protection.outlook.com include:spfrerouting.xink.io include:_spf.salesforce.com -all

📨 DMARC#

Policy	Record (_dmarc.tresu.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#

latest probe, not this scan · checked 2026-10-08 02:27:10

www	193.201.39.91 (AS44398) (address records, no CNAME)
www vs bare domain	Same network tresu.dk: 193.201.39.91 (AS44398) www.tresu.dk: 193.201.39.91 (AS44398)
Wildcard	No

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-tresu-dk._domainkey.tresudk.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-tresu-dk._domainkey.tresudk.onmicrosoft.com	RSA · ~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#

85ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2024110100
Primary NS (MNAME)	a.ns14.net
Responsible (RNAME)	hostmaster@ipdots.com
Refresh	43200s
Retry	7200s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

60ms

50ms

64ms

AAAA

60ms

TXT

277ms

CAA

60ms

HTTPS

64ms

TLSA

366ms

SOA

0ms

MTA-STS

77ms

DNSSEC

85ms

SRV

86ms

Total

1065ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 01:25:06	823ms	4 NS 1 A 1 MX	🔓 Insecure
2026-09-26 13:32:13	884ms	4 NS 1 A 1 MX	🔓 Insecure
2026-09-22 20:46:43	13471ms	4 NS 1 A 1 MX	🔓 Insecure
2026-08-27 22:39:56 shown	1065ms	4 NS 1 A 1 MX	🔓 Insecure
2026-08-18 07:14:08	33265ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-17 21:44:57	5195ms	4 NS 1 A 1 MX	🔓 Insecure