dsu.dk

📜 Historical scan 2026-07-29 03:38:58  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

dsu.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 22 March 1996 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 37.252.121.97 is hosted by Tilaa B.V. (AS196752) in The Netherlands. Mail is handled by .. The zone is DNSSEC-signed and validates, has no 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   221ms
NameserverIP addressesPTRASN / ISP
ns01.one.com 195.206.121.10
2001:67c:28cc::10		 ns01.one.com
ns01.one.com		 AS197495 One.com A/S
AS197495 One.com A/S
ns02.one.com 185.10.11.10
2001:67c:3c0::10		 ns02.one.com
ns02.one.com		 AS51468 One.com A/S
AS51468 One.com A/S

🌍 A Records#

1 records   191ms
IPTTLPTRASNISP / OrgCIDRCountryCity
37.252.121.97 2700s vps-danskskak.tilaa.cloud AS196752 Tilaa B.V. 37.252.120.0/21 🇳🇱 The Netherlands —

📧 MX Records#

1 records   223ms
PriorityTTLMail ServerIP addressesPTRASN
0 300s .  Null MX — domain accepts no email (RFC 7505)

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscoverdsu.dk → 37.252.121.97
🔶 Autoconfigdsu.dk → 37.252.121.97

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

📝
No TXT records found

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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 20:05:45
www CNAMEdsu.dk (all on dsu.dk)
www vs bare domainSame network
WildcardYes: any name under the zone resolves
CDS / CDNSKEYNone 0 CDS, 0 CDNSKEY

🔏 ACME Challenge#

TypeNameValue
CNAME _acme-challenge.dsu.dk dsu.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

310ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

0ms
FieldValue
Serial2026072801
Primary NS (MNAME)ns01.one.com
Responsible (RNAME)hostmaster@one.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)600s

📋 Registration#

WHOIS fetched 2026-10-15 01:29:16
FieldValue
RegistrarPunktum dk A/S (direct)
Registered1996-03-22
Expires2027-03-31 (165d)

🔗 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).

DomainRegistrar
skakdanbase.dkPunktum dk A/S (direct)
📋 WHOIS#

⏱️ Lookup Timing#

NS
221ms
A
191ms
MX
223ms
AAAA
204ms
TXT
377ms
CAA
204ms
HTTPS
185ms
TLSA
894ms
SOA
0ms
MTA-STS
236ms
DNSSEC
310ms
SRV
239ms
Total
1904ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-04 17:01:13 718ms 2 NS 1 A 1 MX 🔒 Secure
2026-09-29 16:41:24 1012ms 2 NS 1 A 1 MX 🔒 Secure
2026-09-04 12:08:31 838ms 2 NS 1 A 1 MX 🔒 Secure
2026-08-30 12:26:47 902ms 2 NS 1 A 1 MX 🔒 Secure
2026-08-06 11:22:36 781ms 2 NS 1 A 1 MX 🔒 Secure
2026-07-29 03:38:58 shown 1904ms 2 NS 1 A 1 MX 🔒 Secure
2026-07-20 17:05:11 5040ms 2 NS 1 A 4 MX 🔒 Secure
2026-07-03 01:36:17 932ms 2 NS 1 A 4 MX 🔒 Secure
2026-06-24 04:34:25 1404ms 2 NS 1 A 4 MX 🔒 Secure
2026-06-17 04:50:14 655ms 2 NS 1 A 4 MX 🔒 Secure
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