dstu.dk

📜 Historical scan 2026-06-25 18:31:27 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

dstu.dk is a .dk domain served by 2 nameservers (ns1.atznet.dk, ns2.atznet.dk). It was registered on 29 August 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.242.130.101 is hosted by Christian Ebsen ApS (AS62121) in Denmark. Mail is handled by mx4.spamfri.dk, mx2.spamfri.dk and 1 more. The zone is of unknown DNSSEC status, 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 32ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.atznet.dk	195.242.130.110 2001:67c:564:fffb::ffff	ns1.atznet.dk —	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
ns2.atznet.dk	2a00:1b18:2:3:2::2 62.69.152.36	ns2.atznet.dk 36.34-46.152.69.62.in-addr.arpa	AS47527 DLX A/S AS47527 DLX A/S

🌍 A Records#

1 records 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
195.242.130.101	3600s	web4.atznet.dk	AS62121	Christian Ebsen ApS	195.242.130.0/23	🇩🇰 Denmark	—

📧 MX Records#

3 records 32ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx4.spamfri.dk	193.200.91.108 2001:67c:564:fffd::4001	mx4.spamfri.dk mx4.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
20	3600s	mx2.spamfri.dk	193.200.91.109 2001:67c:564:fffd::2001	mx2.spamfri.dk mx2.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
30	3600s	mx3.spamfri.dk	2a00:1b18:2:3:fe::2 62.69.152.43 62.69.152.43	mx3.spamfri.dk 43.34-46.152.69.62.in-addr.arpa mx3.spamfri.dk	AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	195.242.130.101
🔶 Autoconfig	195.242.130.101

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 167ms

TXT Record
v=spf1 include:_spf.atznet.dk -all

✉️ SPF#

Policy	Record (dstu.dk)
-all (hard fail)	v=spf1 include:_spf.atznet.dk -all

📨 DMARC#

Policy	Record (_dmarc.dstu.dk)
p=none (monitor only)	v=DMARC1;p=none;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400

📬 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 2026-10-07 18:25:40

www	193.200.90.102 (AS62121) (address records, no CNAME)
www vs bare domain	Same network dstu.dk: 193.200.90.102 (AS62121) www.dstu.dk: 193.200.90.102 (AS62121)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

3 records 49ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx2.spamfri.dk	DANE-EE · SPKI · SHA-256	6598C93F79B95376BB8099E9AC862167…
SMTP _25._tcp.mx3.spamfri.dk	DANE-EE · SPKI · SHA-256	BBFB0694919290E5BC9D6E2C6F47D846…
SMTP _25._tcp.mx4.spamfri.dk	DANE-EE · SPKI · SHA-256	4EE743A99328AEF5142706CA5FD3AD61…

🔐 DNSSEC#

102ms

Check	Result
Validation Status	❓ Unknown
AD Flag (resolver validates)	✗ Not set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	broken trust chain resolving 'dstu.dk/DNSKEY/IN': 127.0.0.1#53

🏷️ SOA#

41ms

Field	Value
Serial	2025031106
Primary NS (MNAME)	ns1.atznet.dk
Responsible (RNAME)	hostmaster@atznet.dk
Refresh	10800s
Retry	3600s
Expire	604800s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-17 10:01:56

Field	Value
Registrar	dns.services ApS
Registered	2023-08-29
Expires	2027-08-28 (315d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

32ms

34ms

32ms

AAAA

32ms

TXT

167ms

CAA

41ms

HTTPS

41ms

TLSA

49ms

SOA

41ms

MTA-STS

49ms

DNSSEC

102ms

SRV

102ms

Total

676ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-29 16:50:32	368ms	2 NS 1 A 3 MX	🔒 Secure
2026-09-06 22:24:14	1903ms	2 NS 1 A 3 MX	🔒 Secure
2026-07-02 10:32:09	3666ms	2 NS 1 A 3 MX	🔒 Secure
2026-06-25 18:31:27 shown	676ms	2 NS 1 A 3 MX	❓ Unknown
2026-06-25 18:21:09	2038ms	2 NS 1 A 3 MX	🔒 Secure
2026-06-21 09:29:14	1050ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 04:50:47	650ms	2 NS 1 A 3 MX	🔒 Secure