dstu.dk

📜 Historical scan 2026-06-17 04:50:47 · ← 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 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 DNSSEC-signed and validates, 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 99ms

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

🌍 A Records#

1 records 85ms

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

📧 MX Records#

3 records 100ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx4.spamfri.dk	193.200.91.108	mx4.spamfri.dk	AS62121 Christian Ebsen ApS
20	—	mx2.spamfri.dk	193.200.91.109	mx2.spamfri.dk	AS62121 Christian Ebsen ApS
30	—	mx3.spamfri.dk	62.69.152.43 62.69.152.43	43.34-46.152.69.62.in-addr.arpa mx3.spamfri.dk	AS47527 DLX A/S AS47527 DLX 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 221ms

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 43ms

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#

221ms

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

🏷️ SOA#

123ms

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#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

99ms

85ms

100ms

AAAA

87ms

TXT

221ms

CAA

102ms

HTTPS

85ms

TLSA

43ms

SOA

123ms

MTA-STS

132ms

DNSSEC

221ms

SRV

0ms

Total

650ms

🕐 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	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 shown	650ms	2 NS 1 A 3 MX	🔒 Secure