dsu.dk
Last scanned: 2026-08-30 12:26:47  ·  902ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   22ms
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 Records1 records   25ms
IPTTLPTRASNISP / OrgCIDRCountryCity
37.252.121.97 2700s vps-danskskak.tilaa.cloud AS196752 Tilaa B.V. 37.252.120.0/21 🇳🇱 The Netherlands —
📧 MX Records1 records   34ms
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
🔏 ACME Challenge
TypeNameValue
CNAME _acme-challenge.dsu.dk dsu.dk
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC94ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA0ms
FieldValue
Serial2026082901
Primary NS (MNAME)ns01.one.com
Responsible (RNAME)hostmaster@one.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
22ms
A
25ms
MX
34ms
AAAA
27ms
TXT
105ms
CAA
26ms
HTTPS
25ms
TLSA
484ms
SOA
0ms
MTA-STS
37ms
DNSSEC
94ms
SRV
41ms
Total
902ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-30 12:26:47 902ms 2 NS 1 A 1 MX 🔒 Secure View
2026-08-06 11:22:36 781ms 2 NS 1 A 1 MX 🔒 Secure View
2026-07-29 03:38:58 1904ms 2 NS 1 A 1 MX 🔒 Secure View
2026-07-20 17:05:11 5040ms 2 NS 1 A 4 MX 🔒 Secure View
2026-07-03 01:36:17 932ms 2 NS 1 A 4 MX 🔒 Secure View
2026-06-24 04:34:25 1404ms 2 NS 1 A 4 MX 🔒 Secure View
2026-06-17 04:50:14 655ms 2 NS 1 A 4 MX 🔒 Secure View
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