ust.dk

📜 Historical scan 2026-06-20 23:26:15 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

ust.dk is a .dk domain served by 3 nameservers (ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk). It was registered on 5 November 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.200.90.180 is hosted by Christian Ebsen ApS (AS62121) in Denmark. Mail is handled by mail.ust.dk. 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#

3 records 34ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.e-studio.dk	195.242.131.5 2001:67c:564:fffc::11	ns1.e-studio.dk ns1.e-studio.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
ns2.e-studio.dk	2a00:1b18:2:3::2 62.69.152.34	ns2.e-studio.dk 34.34-46.152.69.62.in-addr.arpa	AS47527 DLX A/S AS47527 DLX A/S
ns3.e-studio.dk	193.200.90.183 2001:67c:564:fffc::13	ns3.e-studio.dk ns3.e-studio.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS

🌍 A Records#

1 records 51ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.200.90.180	600s	web8.e-studio.dk	AS62121	Christian Ebsen ApS	193.200.90.0/23	🇩🇰 Denmark	—

📧 MX Records#

1 records 49ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mail.ust.dk	193.200.90.180	web8.e-studio.dk	AS62121 Christian Ebsen ApS

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	atollon.hostingnet.dk → 193.200.90.180
🔶 Autoconfig	atollon.hostingnet.dk → 193.200.90.180

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 186ms

TXT Record
v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk +include:_spf.hostingnet.dk -all

✉️ SPF#

Policy	Record (ust.dk)
-all (hard fail)	v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk +include:_spf.hostingnet.dk -all

📨 DMARC#

Policy	Record (_dmarc.ust.dk)
p=none (monitor only)	v=DMARC1;p=none; sp=none; adkim=s; aspf=s

📬 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 01:06:03

www CNAME	ust.dk (all on ust.dk) → 193.200.90.180 (AS62121)
www vs bare domain	Same network ust.dk: 193.200.90.180 (AS62121) www.ust.dk: 193.200.90.180 (AS62121)
Wildcard	No
Denial of existence	NSEC3 · 7 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt
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: 4/10 · policy: -all

error include:_spf.hostingnet.dk has no SPF record: receivers that reach it return permerror (RFC 7208 §5.2)

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.ust.dk	oyK8YErWs_OjKZvzkYWhiZGdrhUVMi9CMleDGUuOG4k

🔗 TLSA / DANE#

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

🔐 DNSSEC#

171ms

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

🏷️ SOA#

67ms

Field	Value
Serial	2026052401
Primary NS (MNAME)	ns1.e-studio.dk
Responsible (RNAME)	hostmaster@mailrelay.e-studio.dk
Refresh	3600s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-17 00:48:27

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	1998-11-05
Expires	2026-12-31 (75d)

🔗 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
0h.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

34ms

51ms

49ms

AAAA

50ms

TXT

186ms

CAA

42ms

HTTPS

72ms

TLSA

73ms

SOA

67ms

MTA-STS

43ms

DNSSEC

171ms

SRV

185ms

Total

449ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 23:21:20	568ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-23 18:02:00	550ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-07 11:46:16	494ms	3 NS 1 A 1 MX	🔓 Insecure
2026-07-25 09:35:23	747ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-27 14:58:25	597ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-24 11:38:24	2799ms	3 NS 1 A 1 MX	❓ Unknown
2026-06-23 14:25:27	1171ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 23:26:15 shown	449ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-17 11:35:39	4624ms	3 NS 1 A 1 MX	🔓 Insecure