course24.dk
Last scanned: 2026-08-27 19:26:19  ·  482ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers3 records   45ms
NameserverIP addressesPTRASN / ISP
ns03.2is.nl 2001:1460:3:4:1c00:b4ff:fe00:270a
62.221.202.199		 ns03.2is.nl
ns03.2is.nl		 AS48635 Your Hosting B.V.
AS48635 Your Hosting B.V.
ns04.2is.be 2001:1460:2:2:1c00:4eff:fe00:2bf6
62.221.197.54		 ns04.2is.be
ns04.2is.be		 AS48635 Your Hosting B.V.
AS48635 Your Hosting B.V.
ns05.2is.nl 194.107.180.31
2a0d:7980:2:100:881:27ff:fe7a:1de9		 hosted-by.savvii.com
—		 AS202053 UpCloud Ltd
AS202053 UpCloud Ltd
🌍 A Records
🌍
No A records found
📧 MX Records
📧
No MX records found
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records1 records   204ms
TXT Record
v=spf1 include:spf.spamservice.nl mx a ~all
✉️ SPF
PolicyRecord (course24.dk)
~all (soft fail) v=spf1 include:spf.spamservice.nl mx a ~all
📨 DMARC
PolicyRecord (_dmarc.course24.dk)
p=none (monitor only) v=DMARC1; p=none;
📬 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
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC110ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsresolution failed: ncache nxrrset
🏷️ SOA0ms
FieldValue
Serial2026082701
Primary NS (MNAME)ns03.2is.nl
Responsible (RNAME)domain-admin@2is.nl
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)3600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
45ms
A
34ms
MX
35ms
AAAA
37ms
TXT
204ms
CAA
38ms
HTTPS
42ms
TLSA
48ms
SOA
0ms
MTA-STS
70ms
DNSSEC
110ms
SRV
64ms
Total
482ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-27 19:26:19 482ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-08-20 04:25:01 1226ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-08-13 05:41:25 2160ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-08-06 16:23:49 805ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-08-03 01:26:47 726ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-07-23 09:23:31 783ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-07-16 20:30:21 1023ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-07-09 05:59:13 948ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-07-03 11:20:27 1811ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-06-25 23:32:46 641ms 3 NS 0 A 0 MX 🔓 Insecure View
2026-06-24 01:54:16 909ms 0 NS 0 A 0 MX ❓ Unknown View
2026-06-16 22:36:29 642ms 3 NS 0 A 0 MX 🔓 Insecure View
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